feat(db): recipe_views table mit Profil-FK und Recent-Index

Tracking-Tabelle fuer Sort-Option Zuletzt angesehen. Composite-PK
(profile_id, recipe_id) erlaubt INSERT OR REPLACE per Default-Timestamp.
Index nach profile_id + last_viewed_at DESC fuer Sort-Query.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/lib/server/db/migrations/014_recipe_views.sql

@@ -0,0 +1,8 @@
+CREATE TABLE recipe_views (
+  profile_id INTEGER NOT NULL REFERENCES profile(id) ON DELETE CASCADE,
+  recipe_id INTEGER NOT NULL REFERENCES recipe(id) ON DELETE CASCADE,
+  last_viewed_at TEXT NOT NULL DEFAULT (datetime('now')),
+  PRIMARY KEY (profile_id, recipe_id)
+);
+CREATE INDEX idx_recipe_views_recent
+  ON recipe_views (profile_id, last_viewed_at DESC);