Code quality improvements: version update, type annotation enhancement, and enum usage simplification (#27581)

Signed-off-by: Bradley <bradley.b.pitt@gmail.com>

docs/deployment/docker.md

@@ -41,11 +41,11 @@ You can add any other [engine-args](../configuration/engine_args.md) you need af
     create a custom Dockerfile on top of the base image with an extra layer that installs them:
 
     ```Dockerfile
-    FROM vllm/vllm-openai:v0.9.0
+    FROM vllm/vllm-openai:v0.11.0
 
     # e.g. install the `audio` optional dependencies
     # NOTE: Make sure the version of vLLM matches the base image!
-    RUN uv pip install --system vllm[audio]==0.9.0
+    RUN uv pip install --system vllm[audio]==0.11.0
     ```
 
 !!! tip

vllm/multimodal/profiling.py

@@ -368,7 +368,7 @@ class MultiModalProfiler(Generic[_I]):
         self,
         seq_len: int,
         mm_counts: Mapping[str, int] | None = None,
-    ):
+    ) -> Mapping[str, int]:
         """
         Returns the maximum length of the multimodal (image placeholders+text)
         tokens, including any break/text tokens in-between image embeddings.

vllm/v1/core/sched/scheduler.py

@@ -113,14 +113,12 @@ class Scheduler(SchedulerInterface):
         # req_id -> Request
         self.requests: dict[str, Request] = {}
         # Scheduling policy
-        if self.scheduler_config.policy == "priority":
-            self.policy = SchedulingPolicy.PRIORITY
-        elif self.scheduler_config.policy == "fcfs":
-            self.policy = SchedulingPolicy.FCFS
-        else:
+        try:
+            self.policy = SchedulingPolicy(self.scheduler_config.policy)
+        except ValueError as e:
             raise ValueError(
                 f"Unknown scheduling policy: {self.scheduler_config.policy}"
-            )
+            ) from e
         # Priority queues for requests.
         self.waiting = create_request_queue(self.policy)
         self.running: list[Request] = []