docs(6206): webhooks, search, rulebooks routes and retrieval_tuning, note, models/__init__ drop citations

routes/search states the derived-facets property rather than the silent
whole-corpus bug that motivated it; routes/rulebooks gives the preference
restore exception its reasoning without the milestone numbers it cited.

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

src/scribe/models/__init__.py

@@ -8,7 +8,7 @@ from scribe.config import Config
 # inline dict cannot be recovered from the engine — and a guard that cannot
 # read the value it guards is a guard that passes forever.
 _CONNECT_ARGS: dict = {
-    # A DEADLINE ON ESTABLISHING A CONNECTION (#4181, rule 156).
+    # A DEADLINE ON ESTABLISHING A CONNECTION.
     #
     # asyncpg's `timeout` bounds the CONNECT — the TCP handshake plus session
     # setup — and nothing else. Against a host whose storage has wedged, that
@@ -80,9 +80,9 @@ from scribe.models.canonical_system import CanonicalSystem  # noqa: E402, F401
 from scribe.models.rulebook import (  # noqa: E402, F401
     Rulebook, RulebookTopic, Rule, RuleRelation, rule_moments, rule_systems,
 )
-# After notes and rules: it foreign-keys both (milestone 440).
+# After notes and rules: it foreign-keys both.
 from scribe.models.lesson_rule_link import LessonNoRule, LessonRuleLink  # noqa: E402, F401
-# After rules: it foreign-keys them (milestone 458 step 7).
+# After rules: it foreign-keys them.
 from scribe.models.rule_moment_judgment import RuleMomentJudgment  # noqa: E402, F401
 from scribe.models.repo_binding import RepoBinding  # noqa: E402, F401
 from scribe.models.forge_connection import ForgeConnection  # noqa: E402, F401
@@ -90,7 +90,7 @@ from scribe.models.code_shape import CodeShape, CodeShapeConsumer, CodeShapeEven
 from scribe.models.system import System, RecordSystem  # noqa: E402, F401
 from scribe.models.design_system import DesignSystem, DesignToken  # noqa: E402, F401
 # After notes, projects and rulebook topics: family canon foreign-keys all
-# three (milestone 463).
+# three.
 from scribe.models.family import (  # noqa: E402, F401
     FamilyAdoption, FamilyDecision, FamilyIdea, FamilyIdeaPlatform,
     FamilyIdeaReference, Platform, ProjectPlatform,