docs(6207): migrations 0088 and 0090-0094 state their rationale in terms of the data

Milestone/step labels, record ids, the rescoped-rule date and the 296-call
measurement go; each header states what the change protects. "rule 36"
citations become the DROP + ADD practice they named.

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

alembic/versions/0092_note_verification.py

@@ -1,5 +1,4 @@
 """a note can carry its own check — verify_with, expires_when, verified_at
-(milestone 317 step 1)
 
 Revision ID: 0092
 Revises: 0091
@@ -32,8 +31,7 @@ Three nullable columns:
 
 WHICH ROWS THESE ARE FOR. `notes` is one table holding notes, tasks,
 snippets and processes, so these columns land on all of them. Only non-task,
-non-snippet records are OFFERED them (milestone 317 decisions 1 and 2, gated
-at the service in step 2): a task's decay is its status, and a snippet
+non-snippet records are OFFERED them (gated at the service): a task's decay is its status, and a snippet
 already carries a richer, location-aware verdict in `data.verification`. The
 columns exist on the other rows and stay null there; a gate that lives in
 the schema would have meant a partial index or a CHECK across three columns
@@ -44,7 +42,7 @@ value of the sweep is that its output is short. A null `verify_with` is not
 an omission; it is the honest marker of "this one is a decision, and there
 is nothing to go and check."
 
-No CHECK constraint is involved, so rule 36 does not apply. Nothing is
+No CHECK constraint is involved. Nothing is
 backfilled: a migration cannot invent a check.
 """
 import sqlalchemy as sa
@@ -69,9 +67,8 @@ def upgrade() -> None:
     #
     # Still a sequential scan's job at this size, and an index on
     # (verified_at) filtered to `verify_with IS NOT NULL` would be maintained
-    # on every note write to serve one operator-initiated query. If step 3's
-    # live acceptance measures otherwise, add it there against a real plan
-    # rather than guessing here.
+    # on every note write to serve one operator-initiated query. If a real
+    # plan says otherwise, add it then rather than guessing here.
 
 
 def downgrade() -> None: