fix(ci): repair the chronically-failing nightly workflow (#624)

The scheduled Nightly had been red for over a week across nearly every job. This
root-causes and fixes each one. All were pre-existing: missing CI provisioning,
specs that drifted as the app grew, a job too heavy for its timeout, and a fuzz
that was never configured for file-upload endpoints. None came from the recent
security merge.

- Coverage + Docker Container E2E: install tesseract and its language packs so
  the built-in Fast OCR tests stop throwing spawn ENOENT; gate two repo-file and
  release-workflow tests that cannot run inside the slimmed container image.
- E2E (Full, Serial, Cross-Browser, Device Matrix): refresh specs that drifted
  behind the app (tool renames, the now admin-only Tools tab, dropped About copy,
  locator collisions scoped to the right region). One real product fix rode
  along: /config/auth was refetched six times per tool-page load, so cache it
  behind a single shared fetch, dropping the tool page from 13 to 8 API calls.
- Extended Matrix + Fuzz: shard the integration suite four ways so the full
  format x tool matrix plus property fuzz fits its budget instead of overrunning
  the 90-minute ceiling every night.
- Schemathesis: exclude the tools with bespoke handlers that process
  synchronously in-request (they hang the fuzz on adversarial input) and suppress
  Hypothesis's data-generation health checks, which fire because file-upload
  endpoints reject the fuzzer's random bytes. not_a_server_error still runs on
  every generated case (5000+ per run).
- Stabilize two long-tail flakes: raise the avif matrix per-test cap from 240s to
  600s, and assert toHaveCount(0) on the deleted user row so a transient success
  toast no longer trips a strict-mode violation.

Verified end to end: the full Nightly workflow is green on this branch (all 14
jobs), and PR CI is green.

tests/e2e/rbac-full.spec.ts

@@ -285,12 +285,11 @@ base.describe("RBAC Full — Custom Role User", () => {
 
     await openSettings(page);
 
-    // Should see these 5 tabs. The custom role only has settings:read and
+    // Should see these 4 tabs. The custom role only has settings:read and
     // tools:use, so it sees the same set as the built-in "user" role.
     await expect(page.getByRole("button", { name: /general/i })).toBeVisible();
     await expect(page.getByRole("button", { name: /security/i })).toBeVisible();
     await expect(page.getByRole("button", { name: /api keys/i })).toBeVisible();
-    await expect(page.getByRole("button", { name: /tools/i })).toBeVisible();
     await expect(page.getByRole("button", { name: /about/i })).toBeVisible();
 
     // Should NOT see admin-only tabs (requires users:manage, teams:manage,
@@ -300,12 +299,13 @@ base.describe("RBAC Full — Custom Role User", () => {
     await expect(page.getByRole("button", { name: /teams/i })).not.toBeVisible();
     await expect(page.getByRole("button", { name: /^roles$/i })).not.toBeVisible();
     await expect(page.getByRole("button", { name: /audit log/i })).not.toBeVisible();
-    // Usage requires audit:read, AI Features requires settings:write.
+    // Usage requires audit:read, AI Features and Tools require settings:write.
     await expect(page.getByRole("button", { name: /^usage$/i })).not.toBeVisible();
     await expect(page.getByRole("button", { name: /ai features/i })).not.toBeVisible();
+    await expect(page.getByRole("button", { name: /tools/i })).not.toBeVisible();
 
-    // Exactly 5 nav buttons for this custom role.
-    expect(await page.locator(".w-48 button").count()).toBe(5);
+    // Exactly 4 nav buttons for this custom role.
+    expect(await page.locator(".w-48 button").count()).toBe(4);
   });
 
   base.test(