feat: push+email notifications, recipe notes, fork/clone, pantry-aware lists, GDPR export

Five S-sized items from HANDOFF.md's new-features backlog, all wiring up
previously-orphaned infra:

- createNotification now sends web push + email for every notification type
  (follow/comment/reply/reaction/rating/mention), not just comments
- Personal recipe notes: private per-user notes on any viewable recipe
  (recipeNotes table had zero API/UI before this)
- Recipe fork/clone: deep-copies a viewable recipe into your own library as
  a private draft, linked via recipeVariations, respects tier quota
- Pantry-aware shopping lists: meal-plan-generated lists now subtract
  on-hand pantry quantities (ingredientId match, falling back to normalized
  name match) and flag partial/ambiguous matches instead of guessing
- GDPR data export: downloadable JSON of a user's own content and activity
  across every relevant table, secrets/internal tables excluded

New migrations 0025 (unique index for recipe-notes upsert) and 0026
(shopping_list_items.in_pantry) generated, left unapplied like 0023/0024.
Verified with typecheck, lint, and a full local `docker build`.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/web/app/api/v1/recipes/[id]/rate/route.ts

@@ -53,6 +53,6 @@ export async function POST(req: NextRequest, { params }: Params) {
     reviewText: parsed.data.reviewText,
     photoKey: parsed.data.photoKey,
   });
-  void createNotification({ userId: recipe.authorId, type: "rating", actorId: session!.user.id, recipeId: id });
+  void createNotification({ userId: recipe.authorId, type: "rating", actorId: session!.user.id, recipeId: id, score: parsed.data.score });
   return NextResponse.json({ created: true }, { status: 201 });
 }