Add the dinners API for Regulars

POST /api/v1/dinners adds a Regular from a name or a recipe link
(status and origin regular, grounding_status pending), refusing a name
harness.Similar to an unarchived dinner, or a known link, with 409.
GET /dinners?status=regular|quest_log lists dinners with photo URLs and
grounding status; PATCH /dinners/{id} edits name, method, minutes and
difficulty; DELETE archives the row; POST /dinners/{id}/favorite toggles
is_favorite. Every write records the session subject as updated_by.

Migration 0008 adds dinners.recipe_url so a pasted link is kept until
grounding resolves it.

Maestro task 28d3cb4b-83d1-40e8-991f-d88f0f64d270.

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

migrations/queries/dinners.sql

@@ -1,12 +1,12 @@
 -- name: CreateDinner :one
 INSERT INTO dinners (
 	id, name, normalized_name, status, origin, method, minutes_total,
-	difficulty, cuisine, is_favorite, recipe_id, photo_id, grounding_status,
-	updated_by, created_at, updated_at
+	difficulty, cuisine, is_favorite, recipe_id, recipe_url, photo_id,
+	grounding_status, updated_by, created_at, updated_at
 ) VALUES (
 	?, ?, ?, ?, ?, ?, ?,
 	?, ?, ?, ?, ?, ?,
-	?, ?, ?
+	?, ?, ?, ?
 )
 RETURNING *;
 
@@ -19,6 +19,12 @@ SELECT * FROM dinners
 WHERE status = ?
 ORDER BY normalized_name, id;
 
+-- name: ListUnarchivedDinners :many
+-- Every dinner a new or renamed dinner must not repeat.
+SELECT * FROM dinners
+WHERE status <> 'archived'
+ORDER BY id;
+
 -- name: UpdateDinner :one
 -- An unknown id returns sql.ErrNoRows.
 UPDATE dinners
@@ -55,3 +61,12 @@ SET is_favorite = ?,
 	updated_at = ?
 WHERE id = ?
 RETURNING *;
+
+-- name: ToggleDinnerFavorite :one
+-- An unknown id returns sql.ErrNoRows.
+UPDATE dinners
+SET is_favorite = 1 - is_favorite,
+	updated_by = ?,
+	updated_at = ?
+WHERE id = ?
+RETURNING *;