feat(inject): label the record kind on each auto-inject menu line

Every injected hit rendered identically, so a recorded snippet was
indistinguishable from a stray dev-log in the one place prior art most
needs to stand out. Each line now carries its kind — [snippet],
[process], [task], [issue], [note] — and the header says "records"
rather than "notes", which it can no longer claim.

Task-ness wins over note_type in the marker: "there's an open issue
about this" is the more useful thing to know at a glance.

Still title-first: the marker is metadata already on the ORM object,
so no extra query and no bodies (#2084).

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RLwAaV4DQEmVyn496HnEvt

tests/test_services_plugin_context.py

@@ -10,13 +10,15 @@ def _rule(rid, title, topic_id):
     return r
 
 
-def _note(nid, title, user_id=1):
+def _note(nid, title, user_id=1, note_type="note", is_task=False, task_kind="work"):
     n = MagicMock()
     n.id, n.title = nid, title
-    # Real int, defaulting to the caller used in these tests: the injected menu
-    # compares it to decide whether the line needs a "shared by …" attribution,
-    # and an auto-MagicMock would read as another user's note.
+    # Real values, defaulting to the caller used in these tests: the injected menu
+    # compares user_id to decide whether the line needs a "shared by …"
+    # attribution, and reads is_task/task_kind/note_type for the kind marker. An
+    # auto-MagicMock is truthy, so every line would read as another user's task.
     n.user_id = user_id
+    n.note_type, n.is_task, n.task_kind = note_type, is_task, task_kind
     return n
 
 
@@ -79,7 +81,7 @@ async def test_build_autoinject_hint_titles_only_with_margin_gate():
                                              exclude_ids=[99])
     # Margin gate kept the top two, dropped the straggler.
     assert out["note_ids"] == [11, 22]
-    assert '#11 "Pool sizing decision" (0.80)' in out["context"]
+    assert '#11 [note] "Pool sizing decision" (0.80)' in out["context"]
     assert "#33" not in out["context"]
     # Title-first: no body text, ever.
     assert "get_note(id)" in out["context"]