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>

internal/server/login_test.go

@@ -83,7 +83,7 @@ func newLoginRouter(t *testing.T, issuer string) http.Handler {
 		t.Fatal(err)
 	}
 	r, err := NewRouter(logger, "dev", trusted, flow, sessions, newTestSettings(t),
-		newTestSearch(t), newTestAI(t), newTestRunner(t), newTestPhotos(t), fstest.MapFS{"index.html": {Data: []byte(fixtureIndex)}})
+		newTestSearch(t), newTestAI(t), newTestDinners(t), newTestRunner(t), newTestPhotos(t), fstest.MapFS{"index.html": {Data: []byte(fixtureIndex)}})
 	if err != nil {
 		t.Fatal(err)
 	}