docs(6205): inception and family comments drop record, milestone and date citations

inception states the legacy stamp and the retired rulebook keys as facts
about stored records; family keeps the repeat-trigger calibration numbers
without the date and record they were measured on, and drops the instance
that taught the per-kind comparison.

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

src/scribe/services/inception.py

@@ -1,4 +1,4 @@
-"""Project inception — what a project was decided to inherit (milestone 297).
+"""Project inception — what a project was decided to inherit.
 
 A project's inheritance is a decision, not a default. The record lives on
 ``projects.inception``::
@@ -14,14 +14,13 @@ A project's inheritance is a decision, not a default. The record lives on
     }
 
 NULL = undecided → enter_project asks. ``legacy`` is the migration's stamp on
-projects that existed before the step did (inherit-all / no design system /
-no seed), so the ask fires only for projects created after this shipped.
+projects that predate inception records (inherit-all / no design system /
+no seed), so the ask fires only for projects created since.
 
-Rules are not a choice any more. ``exclude_always_on_rulebooks`` went with the
-always-on tier (milestone 394), and ``subscribe_rulebooks`` went with
-subscriptions (milestone 414): a rule in a rulebook is global and applies to
-every project, and a project's own rules are written on it directly. Migration
-0101 strips both keys from stored records.
+Rules are not a choice: a rule in a rulebook is global and applies to every
+project, and a project's own rules are written on it directly. Migration 0101
+strips the retired ``exclude_always_on_rulebooks`` and ``subscribe_rulebooks``
+keys from stored records.
 
 The shape and its validator are pure; ``decide`` composes the existing
 services — set_project_design_system and the standard Systems seed — checks
@@ -31,7 +30,7 @@ half-applied decision is re-runnable rather than recorded as done.
 ``current_defaults`` is what the enter_project ask shows: what binds today
 if nobody decides.
 
-``platforms`` (milestone 463) is which platforms the project IS — the answer
+``platforms`` is which platforms the project IS — the answer
 that decides which family ideas reach it. A list of catalog SLUGS, not ids:
 the record is JSON, and a slug survives a backup restore onto an install whose
 ids differ, where an id inside JSON would come back naming another platform.
@@ -54,7 +53,7 @@ CHOICE_KEYS = ("design_system_id", "seed_systems", "platforms")
 def validate_inception(choices) -> str | None:
     """The structural error an inception ``choices`` object would earn, or
     None. Pure and checked BEFORE any effect is applied: a decision either
-    applies whole or errors whole (the StrictArgs lesson, #2709).
+    applies whole or errors whole.
 
     Accepts three keys, each optional: ``design_system_id`` an int or None,
     ``seed_systems`` a bool, ``platforms`` a list of slugs or None. Unknown
@@ -152,7 +151,7 @@ async def decide(
     choices: dict | None,
     via: str,
 ) -> dict:
-    """Record a project's inception decision and apply it (milestone 297).
+    """Record a project's inception decision and apply it.
 
     Owner-only. Validates the choices (pure) and every target (readable)
     first; then, each idempotent: point the project at the design system
@@ -243,8 +242,8 @@ def _platform_line(defaults: dict) -> str:
 
 
 async def inception_ask(user_id: int, project_id: int) -> dict:
-    """The enter_project ask for an undecided project (milestone 297) — the
-    sibling of the systems-bootstrap ask (#2683): the project's OWN current
+    """The enter_project ask for an undecided project — the sibling of the
+    systems-bootstrap ask: the project's OWN current
     defaults, what to ask the operator, and the exact call that answers it.
     Fail-open: a hint must never break the call it rides on."""
     try: