v0.6.5

Changes since v0.6.4

e037eaf Release(version): bump to 0.6.5 and fix release changelog artifact
fa56054 Fix(state): convert legacy naive created_at from local time
5862bda Review state manager UTC logic
dd7ab9e Fix linter warning: rename unused parameter in FailingAgent
c84ac82 Fix: Prevent PipelineAbortSignal in post_run from skipping persistence
2831b84 Mark Issue #590 regression tests as slow
f44f437 Fix PipelineAbortSignal masking UsageLimitExceededError in post_run hooks
6d76531 style: fix pyproject.toml indentation and comment spacing
5476ead fix: correct duplicate 0.6.3 changelog heading
c43dd58 fix: resolve remaining urllib3 CVEs
b0cf486 fix: security vulnerabilities - upgrade dependencies