Repair gRPC Deadlines, Cancellation & Retry Bugs

The likely issue is a contract mismatch around gRPC deadlines, cancellation propagation, retry policy, status mapping, streaming calls, interceptors, background work, idempotency, deadline budgets, and client/server timeout coordination. I would first define the invariant: Every gRPC call must carry one bounded end-to-end deadline budget; cancellation and retries may consume the remaining budget but must not create work that outlives authority or duplicate non-idempotent effects. Then I would trace the smallest owning boundary, apply or propose a bounded repair/review step, and add deterministic normal, boundary, failure and replay tests. The workflow preserves existing authorization, privacy, security policy, public interfaces, user-visible behavior, and documented operational ownership. If repository/workspace files are available, findings can be mapped to exact paths and focused local validation; with partial evidence, the result stays an explicit diagnosis/evidence map with assumptions and no invented execution claims.