refactor: rename package fabledassistant -> scribe (code-only)

Renames src/fabledassistant -> src/scribe and all imports, plus the
default DB name and DB user/password (fabled -> scribe) in config +
compose. 952 refs / 154 files. Reverses the old 'internal name stays
fabledassistant' convention.

Code-only: live databases are still physically named 'fabledassistant'.
Deployed environments must set POSTGRES_DB / POSTGRES_USER (or rename the
DB) since the defaults now resolve to 'scribe'. Repo (FabledScribe), git
host (fabledsword), MCP (fabled-git) and the image name (fabledscribe)
are intentionally unchanged.

ruff check src/ clean locally; CI (typecheck + pytest) is the gate.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/scribe/mcp/tools/search.py

@@ -0,0 +1,49 @@
+"""search — semantic search across the user's notes and tasks.
+
+Mirrors the existing fable-mcp contract so Claude's prior usage pattern keeps
+working. Differences from fable-mcp:
+  - calls services.embeddings.semantic_search_notes directly instead of HTTP
+  - user_id comes from mcp.current_user_id() rather than a global API key
+"""
+from __future__ import annotations
+
+from scribe.mcp._context import current_user_id
+from scribe.services.embeddings import semantic_search_notes
+
+
+async def search(q: str, content_type: str = "all", limit: int = 10) -> dict:
+    """Semantic search over the user's notes and tasks.
+
+    Args:
+        q: search query string.
+        content_type: 'all' (default), 'note' (notes only), or 'task' (tasks only).
+        limit: maximum number of results (1-50).
+
+    Returns:
+        {"results": [{"id", "title", "body", "is_task", "tags", "similarity"}],
+         "total": int}
+    """
+    uid = current_user_id()
+    limit = max(1, min(limit, 50))
+    is_task = {"note": False, "task": True}.get(content_type)  # None => any
+    raw = await semantic_search_notes(
+        uid, q, limit=limit, is_task=is_task,
+    )
+    return {
+        "results": [
+            {
+                "id": note.id,
+                "title": note.title,
+                "body": (note.body or "")[:240],
+                "is_task": bool(note.is_task),
+                "tags": list(note.tags or []),
+                "similarity": float(score),
+            }
+            for score, note in raw
+        ],
+        "total": len(raw),
+    }
+
+
+def register(mcp) -> None:
+    mcp.tool(name="search")(search)