fix(worker): unquote CompilationTimes return annotation

[rebel-jinhwan]

Problem

tests/torch_compile/unit/v1/worker/test_rbln_worker.py::TestInterfaceCompliance::test_compile_or_warm_up_model_returns fails:

AssertionError: assert ('CompilationTimes' is CompilationTimes or 'CompilationTimes' == <class 'inspect._empty'>)
 +  where 'CompilationTimes' = <Signature (self) -> 'CompilationTimes'>.return_annotation

The test checks that RBLNWorker.compile_or_warm_up_model's return annotation is the CompilationTimes class (or inspect.Parameter.empty):

sig = inspect.signature(RBLNWorker.compile_or_warm_up_model)
assert (
    sig.return_annotation is CompilationTimes
    or sig.return_annotation == inspect.Parameter.empty
)

Cause

Commit 8513cf73 ("fix(worker): quote CompilationTimes return annotation") changed the annotation to a string literal:

def compile_or_warm_up_model(self) -> "CompilationTimes":

inspect.signature() does not resolve string annotations, so return_annotation became the string 'CompilationTimes' rather than the class — failing the is CompilationTimes check.

Fix

CompilationTimes is imported unconditionally at module top level (from vllm.v1.worker.worker_base import CompilationTimes, WorkerBase), and the module has no from __future__ import annotations, so the quoting was unnecessary. Unquote it:

def compile_or_warm_up_model(self) -> CompilationTimes:

Now inspect.signature(...).return_annotation resolves to the CompilationTimes class and the test passes.

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