refactor(mcp): drop fable_ prefix from tool names; rebrand to Scribe

MCP clients see tools namespaced by the server's local name already
(mcp__<server>__<tool>), so the fable_ prefix on every tool name was
redundant and ate tokens in the model's tool list.

Tools renamed (34 total):
  fable_search → search
  fable_list_notes / get_note / create_note / update_note / delete_note → list_notes / ...
  fable_list_tasks / get_task / create_task / update_task / add_task_log → list_tasks / ...
  fable_list_projects / get_project / create_project / update_project → list_projects / ...
  fable_list_milestones / create_milestone / update_milestone → list_milestones / ...
  fable_list_events / create_event / get_event / update_event / delete_event → list_events / ...
  fable_list_tags → list_tags
  fable_get_recent → get_recent
  fable_list_persons / create_person / update_person → list_persons / ...
  fable_list_places / create_place / update_place → list_places / ...
  fable_list_lists / create_list / update_list → list_lists / ...

Also rebranded in MCP scope:
  FastMCP("fable", ...) → FastMCP("scribe", ...)
  auth realm "fable-mcp" → "scribe-mcp"
  ASGI scope key fable_user_id → scribe_user_id
  ContextVar label fable_mcp_user_id → scribe_mcp_user_id
  Tool docstrings "in Fable" / "Fable task" → "in Scribe" / "Scribe task"
  Server _INSTRUCTIONS prose

Deliberately kept:
  - The internal Python package name `fabledassistant` (per project naming
    convention — internal stays).
  - "Fabled Scribe" as the official product/brand name (page footer,
    smtp_from_name default).
  - References to the legacy `fable-mcp/` standalone package in docstrings
    explaining what we ported from — accurate until that directory is
    deleted in Phase 10.

Client impact: existing MCP registrations need
  claude mcp remove <name> && claude mcp add ...
once with a freshly-copied snippet from Settings → MCP Access. Claude
Code then re-discovers tools on connect — old conversations that
referenced fable_* tool names will see "tool not found" on those calls
until updated.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/test_mcp_tool_notes.py

@@ -5,8 +5,8 @@ import pytest
 
 from fabledassistant.mcp._context import _user_id_ctx
 from fabledassistant.mcp.tools.notes import (
-    fable_list_notes, fable_get_note, fable_create_note,
-    fable_update_note, fable_delete_note,
+    list_notes, get_note, create_note,
+    update_note, delete_note,
 )
 
 
@@ -32,7 +32,7 @@ async def test_list_notes_repackages_tuple_into_dict():
         "fabledassistant.mcp.tools.notes.notes_svc.list_notes",
         AsyncMock(return_value=(rows, 2)),
     ):
-        out = await fable_list_notes()
+        out = await list_notes()
     assert out["total"] == 2
     assert len(out["notes"]) == 2
 
@@ -41,7 +41,7 @@ async def test_list_notes_repackages_tuple_into_dict():
 async def test_list_notes_passes_is_task_false():
     mock = AsyncMock(return_value=([], 0))
     with patch("fabledassistant.mcp.tools.notes.notes_svc.list_notes", mock):
-        await fable_list_notes()
+        await list_notes()
     assert mock.call_args.kwargs["is_task"] is False
 
 
@@ -50,7 +50,7 @@ async def test_list_notes_tag_filter_maps_to_list():
     """The single-tag string param maps to a one-element list at the service layer."""
     mock = AsyncMock(return_value=([], 0))
     with patch("fabledassistant.mcp.tools.notes.notes_svc.list_notes", mock):
-        await fable_list_notes(tag="ops")
+        await list_notes(tag="ops")
     assert mock.call_args.kwargs["tags"] == ["ops"]
 
 
@@ -58,7 +58,7 @@ async def test_list_notes_tag_filter_maps_to_list():
 async def test_list_notes_empty_tag_means_no_filter():
     mock = AsyncMock(return_value=([], 0))
     with patch("fabledassistant.mcp.tools.notes.notes_svc.list_notes", mock):
-        await fable_list_notes(tag="")
+        await list_notes(tag="")
     assert mock.call_args.kwargs["tags"] is None
 
 
@@ -66,7 +66,7 @@ async def test_list_notes_empty_tag_means_no_filter():
 async def test_list_notes_search_text_maps_to_q():
     mock = AsyncMock(return_value=([], 0))
     with patch("fabledassistant.mcp.tools.notes.notes_svc.list_notes", mock):
-        await fable_list_notes(search_text="kafka")
+        await list_notes(search_text="kafka")
     assert mock.call_args.kwargs["q"] == "kafka"
 
 
@@ -74,7 +74,7 @@ async def test_list_notes_search_text_maps_to_q():
 async def test_list_notes_limit_clamped():
     mock = AsyncMock(return_value=([], 0))
     with patch("fabledassistant.mcp.tools.notes.notes_svc.list_notes", mock):
-        await fable_list_notes(limit=9999)
+        await list_notes(limit=9999)
     assert mock.call_args.kwargs["limit"] == 100
 
 
@@ -85,7 +85,7 @@ async def test_get_note_returns_dict():
         "fabledassistant.mcp.tools.notes.notes_svc.get_note",
         AsyncMock(return_value=fake),
     ):
-        out = await fable_get_note(note_id=5)
+        out = await get_note(note_id=5)
     assert out["id"] == 5
     assert out["title"] == "found"
 
@@ -97,7 +97,7 @@ async def test_get_note_raises_when_not_found():
         AsyncMock(return_value=None),
     ):
         with pytest.raises(ValueError, match="note 999 not found"):
-            await fable_get_note(note_id=999)
+            await get_note(note_id=999)
 
 
 @pytest.mark.asyncio
@@ -105,7 +105,7 @@ async def test_create_note_passes_through():
     fake = _fake_note(id=10, title="new")
     mock = AsyncMock(return_value=fake)
     with patch("fabledassistant.mcp.tools.notes.notes_svc.create_note", mock):
-        out = await fable_create_note(title="new", body="x", tags=["a"], project_id=5)
+        out = await create_note(title="new", body="x", tags=["a"], project_id=5)
     assert out["id"] == 10
     assert mock.call_args.kwargs["title"] == "new"
     assert mock.call_args.kwargs["project_id"] == 5
@@ -117,7 +117,7 @@ async def test_create_note_project_zero_becomes_none():
     fake = _fake_note()
     mock = AsyncMock(return_value=fake)
     with patch("fabledassistant.mcp.tools.notes.notes_svc.create_note", mock):
-        await fable_create_note(title="t", project_id=0)
+        await create_note(title="t", project_id=0)
     assert mock.call_args.kwargs["project_id"] is None
 
 
@@ -128,7 +128,7 @@ async def test_update_note_only_sends_non_default_fields():
     fake = _fake_note()
     mock = AsyncMock(return_value=fake)
     with patch("fabledassistant.mcp.tools.notes.notes_svc.update_note", mock):
-        await fable_update_note(note_id=1, title="new title")
+        await update_note(note_id=1, title="new title")
     # Service got user_id, note_id positional + only the title kwarg
     args, kwargs = mock.call_args
     assert args == (7, 1)
@@ -141,7 +141,7 @@ async def test_update_note_empty_tags_clears_explicitly():
     fake = _fake_note()
     mock = AsyncMock(return_value=fake)
     with patch("fabledassistant.mcp.tools.notes.notes_svc.update_note", mock):
-        await fable_update_note(note_id=1, tags=[])
+        await update_note(note_id=1, tags=[])
     assert mock.call_args.kwargs == {"tags": []}
 
 
@@ -150,7 +150,7 @@ async def test_update_note_tags_none_means_omit():
     fake = _fake_note()
     mock = AsyncMock(return_value=fake)
     with patch("fabledassistant.mcp.tools.notes.notes_svc.update_note", mock):
-        await fable_update_note(note_id=1, tags=None)
+        await update_note(note_id=1, tags=None)
     assert "tags" not in mock.call_args.kwargs
 
 
@@ -161,7 +161,7 @@ async def test_update_note_raises_when_not_found():
         AsyncMock(return_value=None),
     ):
         with pytest.raises(ValueError, match="note 999 not found"):
-            await fable_update_note(note_id=999, title="x")
+            await update_note(note_id=999, title="x")
 
 
 @pytest.mark.asyncio
@@ -170,7 +170,7 @@ async def test_delete_note_returns_confirmation_string():
         "fabledassistant.mcp.tools.notes.notes_svc.delete_note",
         AsyncMock(return_value=True),
     ):
-        result = await fable_delete_note(note_id=7)
+        result = await delete_note(note_id=7)
     assert result == "Note 7 deleted."
 
 
@@ -181,4 +181,4 @@ async def test_delete_note_raises_when_not_found():
         AsyncMock(return_value=False),
     ):
         with pytest.raises(ValueError, match="note 999 not found"):
-            await fable_delete_note(note_id=999)
+            await delete_note(note_id=999)