Keep Pass history immutable and replenish atomic with decisions

Fixes the three review findings on 50399b6 (pull request #102):

- A batch now rereads every declined name inside its storing transaction,
  so a Pass committed after the batch read its input but before it stores
  can no longer let the passed dish into the deck (SQ-01).
- A decision that leaves the deck under five creates the replenish batch
  and its job in the decision's own transaction, so a decision is never
  recorded without the replenish it calls for; when they cannot be
  written, neither is the decision, and a retry decides again (SQ-02).
  StartBatch commits the batch with its job the same way, replacing the
  mutex and the fail-on-enqueue cleanup. jobs gains Kind.EnqueueTx and
  Kind.Wake for this.
- Migration 0012 gives each suggestion the name its dish was suggested
  under; declined names for batches and the household context's passed
  list read it instead of the dinner's mutable name, so renaming a passed
  dinner no longer erases it from dedupe (SQ-03).

Task: b4f2558c-227f-4627-852b-be5aa190242a

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

internal/ai/harness/context_test.go

@@ -82,9 +82,9 @@ func (s *seeder) pass(name, decidedAt string) {
 	batch := s.id("batch")
 	s.exec(`INSERT INTO suggestion_batches (id, trigger, status, created_at, updated_at)
 		VALUES (?, 'manual', 'done', ?, ?)`, batch, decidedAt, decidedAt)
-	s.exec(`INSERT INTO suggestions (id, dinner_id, batch_id, reason, cited_regular_ids, status,
-		decided_at, created_at, updated_at) VALUES (?, ?, ?, 'why', '[]', 'declined', ?, ?, ?)`,
-		s.id("suggestion"), s.dinner(name, "archived", "", "", 0, false), batch, decidedAt, decidedAt, decidedAt)
+	s.exec(`INSERT INTO suggestions (id, dinner_id, batch_id, name, reason, cited_regular_ids, status,
+		decided_at, created_at, updated_at) VALUES (?, ?, ?, ?, 'why', '[]', 'declined', ?, ?, ?)`,
+		s.id("suggestion"), s.dinner(name, "archived", "", "", 0, false), batch, name, decidedAt, decidedAt, decidedAt)
 }
 
 // plan inserts the week plan starting weekStart with one dinner per date;