- sync/mod.rs: wrap scan_skills_from_dir in spawn_blocking to avoid
blocking the async executor; use to_path_buf() to get owned PathBuf
- pool/worker.rs: replace 500ms poll sleep with cancellation-is_cancelled
check (eliminates artificial latency); add exponential backoff on Redis
errors (1s base, 32s cap, reset on success)
- pool/redis.rs: add 5s timeout on pool.get() for all three methods
(next, ack_raw, nak_with_retry) to prevent indefinite blocking on
unresponsive Redis
- sync/gc.rs: add comment explaining why git gc --auto non-zero exit
is benign
- webhook_dispatch.rs: remove unnecessary format! wrappers in slog macros
- config/hook.rs: document max_concurrent intent (K8s operator/HPA, not
the single-threaded worker itself)
- Add retry_count to HookTask with serde(default) for backwards compat
- Limit hook task retries to MAX_RETRIES=5, discard after limit to prevent
infinite requeue loops that caused 'task nack'd and requeued' log spam
- Add nak_with_retry() in RedisConsumer to requeue with incremented count
- Standardize all slog logs: replace "info!(l, "msg"; "k" => v)" shorthand
with "info!(l, "{}", format!("msg k={}", v))" across ssh/authz.rs,
ssh/handle.rs, ssh/server.rs, hook/webhook_dispatch.rs, hook/pool/mod.rs
