docs(6209): forge, dedup, tuning, registry, reply shapes and discipline, checkpoint, lesson kind tests

Eight more test files state their properties without issue, milestone,
rule and decision numbers. The tuning and suspension notes describe the
symptom a shipped default or a late ledger produces instead of one
install's dated readings; the reply-discipline and checkpoint docstrings
state the failure they prevent instead of the session that measured it.
test_empty_selector_is_the_rule_115_baseline is renamed for what it
checks: the no-forge baseline.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/test_services_dedup.py

@@ -43,7 +43,7 @@ async def test_short_body_skips_semantic_check():
 
 @pytest.mark.asyncio
 async def test_semantic_match_when_body_substantial():
-    # A note blocks only in the copy band (#4306).
+    # A note blocks only in the copy band.
     hit = fake_note(id=20, title="Existing", note_type="note")
     sem = AsyncMock(return_value=[(0.99, hit)])
     with patch("scribe.services.dedup.async_session",
@@ -60,8 +60,8 @@ async def test_semantic_match_when_body_substantial():
 
 @pytest.mark.asyncio
 async def test_a_near_note_is_surfaced_not_blocked():
-    """#4306: sibling notes — the next dev-log, another part of one design —
-    measured 0.90–0.98, so a match there is shown for the session to judge
+    """Sibling notes — the next dev-log, another part of one design — measure
+    0.90–0.98, so a match there is shown for the session to judge
     instead of refusing the write."""
     from scribe.services.dedup import _NOTE_OVERLAP_FLOOR
 
@@ -133,9 +133,9 @@ def test_a_batch_overlap_names_its_record():
 
 @pytest.mark.asyncio
 async def test_gate_catches_a_duplicate_hiding_in_a_later_chunk():
-    """The capability #280 adds to the gate: a long candidate that duplicates
-    an existing record in ONE SECTION is caught, where the whole-document
-    query this replaces diluted exactly the section that mattered. The gate
+    """A long candidate that duplicates an existing record in ONE SECTION is
+    caught; a whole-document query would dilute exactly the section that
+    matters. The gate
     queries once per chunk and any chunk's hit blocks."""
     para = ("This section restates an existing decision in enough words to be "
             "a real paragraph of content for the chunker to keep. ") * 4
@@ -202,13 +202,13 @@ def test_duplicate_response_shape():
     assert "update_task" in r["message"]
 
 
-# --- snippet structural identity (#2518) -------------------------------------
+# --- snippet structural identity ---------------------------------------------
 #
-# The gate used to compare a snippet's rendered DOCUMENT, which is mostly prose
-# about the code. Measured on the button corpus, that failed in both directions
-# at once: two deliberately-parallel variants were refused at 0.92, while a
-# verbatim re-record of one snippet under a different name scored below 0.90 and
-# was created. These tests pin the structural signals that replaced it.
+# A snippet's rendered DOCUMENT is mostly prose about the code, and comparing
+# it fails in both directions at once: two deliberately-parallel variants
+# refused at 0.92, while a verbatim re-record under a different name scores
+# below 0.90 and is created. These tests pin the structural signals used
+# instead.
 
 
 def _session_sequence(results):
@@ -371,7 +371,7 @@ def test_duplicate_response_names_what_matched_for_structural_hits():
     assert "identical code" in r["message"]
 
 
-# --- the generalised report (#2547) ------------------------------------------
+# --- the generalised report -------------------------------------------------
 
 
 @pytest.mark.asyncio
@@ -404,7 +404,7 @@ def test_every_kind_has_a_suggestion_and_none_proposes_merging_notes():
     """The suggestion is the report's point: what to DO differs by what the
     records are, and 'merge' is only ever the answer for snippets — folding two
     notes destroys what each said, which is why consolidated_at was dropped
-    rather than built (#2483)."""
+    rather than built."""
     from scribe.services.dedup import _KIND_SUGGESTION, _REPORT_KINDS
 
     for kind in _REPORT_KINDS:
@@ -418,7 +418,7 @@ def test_every_kind_has_a_suggestion_and_none_proposes_merging_notes():
     assert "supersedes" in _KIND_SUGGESTION["note"]
 
 
-# ── the plan gate (milestone 415, step 4) ─────────────────────────────────────
+# ── the plan gate ─────────────────────────────────────────────────────────────
 
 
 @pytest.mark.asyncio