Integrate structured review panel findings into an implementation plan document. Takes output from agent-review-panel (or any structured review with severity-rated findings) and cross-references each finding against the plan, classifies it into an action category, applies concrete edits, and produces a traceability summary. Trigger when the user says "update the plan with review findings", "incorporate review feedback into the plan", "integrate review results", "apply review recommendations to the plan", "cross-reference review output against the plan", "merge review findings into the implementation plan", "what needs to change in the plan based on the review", "take the review panel output and update my plan", "reconcile the review feedback with the current plan", or invokes /plan-review-integrator. Does NOT trigger for running a review panel (use agent-review-panel), writing a plan from scratch, general code review, summarizing review findings without applying them, or brainstorming implementation approaches.