[wp_kw333y67w2xz6ctx] Add a finite accepted-findings circuit breaker

[Pimpmuckl]

Summary

• count distinct caller-accepted findings trees and require a durable decision after three
• add immediate contract-conflict reporting plus one-use CONTINUE, REPLAN, and RESLICE
• remove only the exhausted-budget new-cycle path while preserving restart and recovery flows

Validation

• 647 Review Suite tests passed
• Ruff lint and format passed
• Python compileall and parent diff checks passed
• Review Suite fast rvw_80d9fd0e completed on exact head

Scope

Implementation additions: 259. Test additions: 193. Base: stack/wr-dqwcom36/02-review-brief.