feat(review-pr): add configurable confidence-threshold input (#23) #59

Job	Run time
Output Extraction Tests	6s
Job Summary Format Tests	4s
Resolve PR Context	0s
Mention Reply (Top-Level) E2E Test	0s
Invalid Agent Test	0s
Pirate Agent Test	0s
Mention Reply (Inline) E2E Test	0s
	10s

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