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_moments.py

@@ -115,9 +115,15 @@ def test_the_tools_are_registered_and_classified():
 
     mcp = FakeMCP()
     tool.register(mcp)
-    assert mcp.names == ["list_moments", "map_action", "unmap_action"]
-    assert "list_moments" in _READ_ONLY_TOOLS
-    assert {"map_action", "unmap_action"} <= _WRITE_TOOLS
+    assert mcp.names == [
+        "list_moments", "map_action", "unmap_action",
+        "rules_to_mount", "propose_rule_moments", "rule_moment_proposals",
+        "judge_rule_moments",
+    ]
+    assert {"list_moments", "rules_to_mount", "rule_moment_proposals"} <= _READ_ONLY_TOOLS
+    # A confirm mounts a rule, so a read key must not reach it.
+    assert {"map_action", "unmap_action",
+            "propose_rule_moments", "judge_rule_moments"} <= _WRITE_TOOLS
 
 
 def test_both_doors_read_one_catalog():