fix: close TOCTOU race + missing checks in tier limits, add AI rate limits, patch CVEs (v0.60.0)

Security audit fixes (see SECURITY_AUDIT.md):
- lib/tiers.ts: checkAndIncrementTierLimit's recipe/storage branches did a
  live count/sum check with no lock tying it to the later write, so two
  concurrent requests near the cap could both pass and both write past the
  limit. Added checkTierLimitInTransaction — holds a per-user Postgres
  advisory lock for the duration of the caller's transaction, so the check
  and the write are atomic together. Applied to every recipe/storage write
  path (recipes create/update, fork, rate, avatar, and 7 AI recipe-creation
  routes).
- Adversarial re-verification of that fix caught a bigger gap in the same
  area: four AI routes (photo import, idea generation, batch-cook,
  translate-to-new-draft) had no recipe-limit check at all. Fixed.
- Added missing per-user rate limits to 5 AI endpoints (adapt, drinks,
  pairings, translate, variations) that had none, unlike their siblings.
- search page now checks for a session server-side, matching every other
  page under (app)/ — defense in depth; the underlying API was already
  public by design and proxy.ts already blocked unauthenticated requests.
- admin/settings route now uses the shared requireAdmin instead of a local
  duplicate.
- Documented two admin support-ticket endpoints missing from the OpenAPI
  spec; verified full route/OpenAPI parity otherwise.
- Bumped drizzle-orm to fix a SQL-identifier-escaping CVE, and overrode two
  transitive deps (esbuild, postcss) with known CVEs. pnpm audit is clean.

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

apps/web/app/api/v1/recipes/__tests__/route.test.ts

@@ -12,8 +12,7 @@ vi.mock("@/lib/api-auth", () => ({
 }));
 
 vi.mock("@/lib/tiers", () => ({
-  checkAndIncrementTierLimit: vi.fn(),
-  incrementUsage: vi.fn(),
+  checkTierLimitInTransaction: vi.fn(),
   TierLimitError: class TierLimitError extends Error {},
 }));
 
@@ -134,9 +133,8 @@ describe("POST /api/v1/recipes", () => {
   });
 
   it("returns 403 when tier limit reached", async () => {
-    const { checkAndIncrementTierLimit } = await import("@/lib/tiers");
-    const { TierLimitError } = await import("@/lib/tiers");
-    vi.mocked(checkAndIncrementTierLimit).mockRejectedValue(new TierLimitError("recipe", "free"));
+    const { checkTierLimitInTransaction, TierLimitError } = await import("@/lib/tiers");
+    vi.mocked(checkTierLimitInTransaction).mockRejectedValue(new TierLimitError("recipe", "free"));
 
     const res = await POST(makeRequest("POST", validRecipe));
     expect(res.status).toBe(403);