chore: ruff auto-fix PLR6201 — tuple → set in membership tests (#23937)

Replace  with  for all literal-tuple
membership tests. Set lookup is O(1) vs O(n) for tuple — consistent
micro-optimization across the codebase.

608 instances fixed via `ruff --fix --unsafe-fixes`, 0 remaining.
133 files, +626/-626 (net zero).

tools/browser_providers/browserbase.py

@@ -180,7 +180,7 @@ class BrowserbaseProvider(CloudBrowserProvider):
                 },
                 timeout=10,
             )
-            if response.status_code in (200, 201, 204):
+            if response.status_code in {200, 201, 204}:
                 logger.debug("Successfully closed Browserbase session %s", session_id)
                 return True
             else: