feat(moments): a mount that keeps arriving where it does not apply proposes its own removal (milestone 458 step 7b, #4955)

The open-after-moment signal proposes a mount; nothing proposed taking one
off, so a wrong mount was noise at every occurrence until someone happened
to notice. rule_misfired(rule_id, moment, why, reached_by) records a report
against a MOUNTED pair, counted per distinct day (the MCP door carries no
session id) on a new rule_moment_judgments.misfire column (migration 0119,
backup v24). At three days the response carries a line asking the agent to
offer the operator the fix - reject takes the rule off, unmap_action stops
the action reaching the moment, confirm keeps the mount and stops the
asking - and Settings > Moments lists it as an unmount proposal with the
reasons and the actions that reached it. A re-mount clears the count.

Taught in moments.md, missed-retrieval.md and the reply hold's wording.

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

src/scribe/services/moment_delivery.py

@@ -181,13 +181,22 @@ def reply_hold_reason(held: list[dict]) -> str:
         trigger = f"; it applies when {item['trigger']}" if item.get("trigger") else ""
         parts.append(f"“{item['title']}” ({why}{trigger}) — get_rule({item['rule_id']})")
     noun = "a standing rule" if len(held) == 1 else "standing rules"
+    # A mount that does not bear on this reply is a misfire worth one call:
+    # reports gather into an unmount proposal for the operator (step 7b).
+    mounted = [item for item in held if item.get("moment")]
+    misfire = (
+        " If one mounted on a moment has nothing to do with this reply, "
+        f"rule_misfired({mounted[0]['rule_id']}, \"{mounted[0]['moment']}\", why) "
+        "records that."
+        if mounted else ""
+    )
     return (
         f"Held for one read before this reply goes out: {noun} this session "
         f"has not opened: " + "; ".join(parts) + ". Read "
         + ("it" if len(held) == 1 else "them")
         + ", then send the reply — unchanged if it already does what the rule "
-        "asks, which is a judgement only you can make. This check runs once "
-        "per rule; the rewrite is never held."
+        "asks, which is a judgement only you can make." + misfire
+        + " This check runs once per rule; the rewrite is never held."
     )