feat(moments): mount the corpus by proposal - a pass and an open-after-moment signal, both stopping at the operator (milestone 458 step 7, #4925)

A rule written before moments existed is mounted on nothing. Step 7 records,
per (rule, moment), whether it belongs there and who said so:

- rule_moment_judgments (migration 0118, backup v23): suggested / confirmed /
  rejected, from a pass, the signal, or an edit. Moment "" is "no moment fits".
- The pass: rules_to_mount lists unjudged rules; propose_rule_moments records
  suggestions that mount nothing; rule_moment_proposals and
  judge_rule_moments put them to the operator. A confirm mounts, a reject is
  kept so the pair is never proposed again. Same service behind REST and a
  "Waiting on you" panel in Settings > Moments.
- Edits are judgments: set_rule_moments, the one mount write path, confirms
  what was added and rejects what was removed in the same transaction.
- The signal: scribe_moment.sh keeps a per-session acts ledger; when a rule
  is opened, scribe_record_opened.sh sends the last three minutes of it to
  /api/plugin/rule-opened. The acts resolve through the install's mappings;
  work.run and work.change are not evidence. Counted per distinct session
  with lesson_rules' evidence model, and once due the open returns one line
  asking the reader to offer the mount.
- scribe_session_end.sh removes the session's scribe-moment files.

Plugin 2026.10.05.2003.

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

tests/test_services_backup.py

@@ -27,7 +27,7 @@ def test_backup_version_is_current():
 
     (Named for the number it asserted until v10, which is exactly the drift a
     name-carrying-a-value invites; it now says what it checks.)"""
-    assert backup.BACKUP_VERSION == 22
+    assert backup.BACKUP_VERSION == 23
 
 
 def _exportable_note(**over):
@@ -132,6 +132,7 @@ def _column_guard_targets():
     from scribe.models.canonical_system import CanonicalSystem
     from scribe.models.code_shape import CodeShape, CodeShapeEvent, CodeShapeUse
     from scribe.models.lesson_rule_link import LessonNoRule, LessonRuleLink
+    from scribe.models.rule_moment_judgment import RuleMomentJudgment
     from scribe.models.design_system import DesignSystem, DesignToken
     from scribe.models.milestone import Milestone
     from scribe.models.note import Note
@@ -172,6 +173,7 @@ def _column_guard_targets():
         "rule_relations": (RuleRelation, backup._rule_relation_rows),
         "lesson_rule_links": (LessonRuleLink, backup._lesson_rule_link_rows),
         "lesson_no_rule": (LessonNoRule, backup._lesson_no_rule_rows),
+        "rule_moment_judgments": (RuleMomentJudgment, backup._rule_moment_judgment_rows),
         "note_usage_events": (NoteUsageEvent, backup._usage_event_rows),
         "rule_usage_events": (RuleUsageEvent, backup._rule_usage_event_rows),
         "system_usage_events": (SystemUsageEvent, backup._system_usage_event_rows),
@@ -551,7 +553,9 @@ async def test_export_full_backup_contains_every_declared_section():
                 # v19: the lessons judged to fall under no rule.
                 "lesson_no_rule",
                 # v20: whether an area's rulings were read once shown.
-                "system_usage_events"):
+                "system_usage_events",
+                # v23: proposals and judgments about a rule's moments.
+                "rule_moment_judgments"):
         assert key in out, f"missing export section: {key}"
         assert out[key] == []