fix(anthropic): stop annotating loop-assigned locals as Final

The recursion-to-loop rewrite carried its Final annotations onto locals that are now
assigned once per iteration, which basedpyright reports as an error: a Final cannot be
assigned within a loop. Each is a genuine per-iteration rebind, so they carry rebind-ok
with the reason instead

litellm/llms/anthropic/common_utils.py

@@ -189,7 +189,7 @@ def _fetch_anthropic_model_ids(
     collected: tuple[str, ...] = ()  # rebind-ok: accumulates one page of ids per iteration
     cursor: str | None = after_id  # rebind-ok: advances to each page's last_id
     for _ in range(max(pages_left, 0)):
-        page: Final = _fetch_anthropic_models_page(api_base, headers, cursor)
+        page = _fetch_anthropic_models_page(api_base, headers, cursor)  # rebind-ok: one page per iteration
         collected += tuple(entry.id for entry in page.data)
         if not page.has_more or page.last_id is None:
             return collected

litellm/llms/anthropic/wif.py

@@ -278,7 +278,7 @@ def _strip_path_suffixes(path: str) -> str:
     token URL. Each pass removes at most one suffix, so the loop is bounded by the segment count."""
     trimmed = path.rstrip("/")  # rebind-ok: fixed-point strip, one suffix per pass
     while True:
-        shortened: Final = next(
+        shortened = next(  # rebind-ok: one suffix removed per iteration
             (trimmed.removesuffix(suffix) for suffix in _CHAT_BASE_SUFFIXES if trimmed.endswith(suffix)),
             trimmed,
         )