Keep a dropped dinner's name immutable and 404 a never-checked dinner

R-01: a Rotation check decided drop now records the dinner's name at the
decision in rotation_reviews.name (migration 0014, a table rebuild as 0012
did for suggestions; checks dropped before it take their dinner's name).
ListPassedNames and ListRecentPassedNames read that name instead of the
mutable dinners.name, so renaming the archived dinner no longer lets the
dropped dish back into a Side quest batch. A CHECK keeps a name on drops
only.

R-02: deciding on a dinner that has never had a Rotation check is now
ErrReviewNotFound, 404 not_found; a dinner whose checks are all decided,
such as a second decision, stays 409 no_pending_review.

Tests: TestLaterBatchNeverResuggestsRenamedDrop (drop, rename, next batch
still refuses the original name), TestMigrateRotationReviewName (0013 to
0014 upgrade and constraints), TestPostRotationReviewNeverChecked (404),
and TestDecideReview/TestDecideReviewRefused updated.

Maestro: a1887d1c-c405-478c-ac7d-8cb8b40d280d

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

internal/db/querier.go

@@ -25,6 +25,8 @@ type Querier interface {
 	CountDeck(ctx context.Context) (int64, error)
 	// How many Regulars the household has; archived dinners are not counted.
 	CountRegularDinners(ctx context.Context) (int64, error)
+	// How many Rotation checks dinner_id has had, pending or decided.
+	CountRotationReviews(ctx context.Context, dinnerID string) (int64, error)
 	CreateAIRun(ctx context.Context, arg CreateAIRunParams) error
 	CreateDinner(ctx context.Context, arg CreateDinnerParams) (Dinner, error)
 	CreateJob(ctx context.Context, arg CreateJobParams) error
@@ -40,8 +42,9 @@ type Querier interface {
 	CreateSuggestion(ctx context.Context, arg CreateSuggestionParams) error
 	CreateSuggestionBatch(ctx context.Context, arg CreateSuggestionBatchParams) (SuggestionBatch, error)
 	CreateWeekPlan(ctx context.Context, arg CreateWeekPlanParams) error
-	// Records the household's decision on a pending Rotation check; one
-	// already decided is left as it is (0 rows).
+	// Records the household's decision on a pending Rotation check, with the
+	// dinner's name for a drop and NULL otherwise; one already decided is left
+	// as it is (0 rows).
 	DecideRotationReview(ctx context.Context, arg DecideRotationReviewParams) (int64, error)
 	// Records the household's decision on a pending suggestion; one already
 	// decided is left as it is (0 rows).
@@ -136,8 +139,8 @@ type Querier interface {
 	ListDraftPool(ctx context.Context, arg ListDraftPoolParams) ([]Dinner, error)
 	// Every name the household turned down, oldest decision first: the name
 	// each declined suggestion was suggested under, which renaming its dinner
-	// does not change, and the name of each dinner a Rotation check dropped
-	// ("Not for us"), which archiving keeps.
+	// does not change, and the name each dinner a Rotation check dropped
+	// ("Not for us") had when dropped, which renaming it does not change.
 	ListPassedNames(ctx context.Context) ([]string, error)
 	// The pending Rotation checks whose dinner is still tried, oldest plan
 	// date first, with their dinners.