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tiennm99
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Concurrency - lolschedule: serialize subscriber Get→mutate→Put via state.subscribersMu; the single-slot list was previously losing writes under concurrent /lolschedule_subscribe. - trading: PriceClient memoises its default *http.Client so /trade_stats reuses TLS connections across held tickers. Observability - server/log_middleware: defer the req log line and recover panics so a panicking cron handler still emits the structured req entry CloudWatch filters on for 5xx alerting. - server/router (cron): inner recover with cron-name context captures the panicking job before the middleware's safety net does. - telegram/webhook: rune-safe truncation in dispatch logs — Vietnamese, Korean, and emoji previews no longer ship as garbled bytes. - lolschedule/api_client: same rune-safe fix for error-body log truncation. - telegram/webhook: gate the post-recover WriteHeader(200) so a panicking handler that already touched w doesn't trigger superfluous-WriteHeader. Correctness - twentyq: clearGame error during solved-relaunch is logged instead of silently swallowed (was a permanent deadlock vector on KV failure). - misc /mstats: KV read failure replies "Could not load stats. Try again later." to the user instead of returning into the dispatcher; matches the pattern other modules use. - migrate_cf_data trading-audit-dump: surface f.Close error so a truncated JSONL never passes silently as a complete audit dump. Operator ergonomics - migrate_cf_data (all 4 subcommands): signal.NotifyContext for SIGINT / SIGTERM. Ctrl-C mid-Scan now propagates cleanly instead of leaving a half-converted DynamoDB table. - ai/ratelimit: doc the Lambda-recycle memory bound to match keylock.Map so a future reviewer doesn't re-flag the unbounded map. I/O-changing (user-approved) - lolschedule daily push auto-prunes subscribers whose Telegram error matches a terminal marker (blocked / deactivated / chat gone). Transient errors keep the chat on the list. Subscribe message updated to mention the auto-cleanup. - twentyq seed pool grown 50 → 178; repeat-collision threshold moves from ~9 plays to ~17 (birthday paradox). - util /info flipped Public → Protected — chat/thread/sender IDs are no longer enumerable by every group member. - cmd/server WriteTimeout 6min → 75s (cron 60s + 15s slack). No-op on Lambda; matters only for local non-Lambda runs. - webhook + cron rejection paths drop response bodies (no fingerprintable text for internet scanners hitting the public Function URL). Status codes preserved for CloudWatch metrics; structured log lines carry the rejection reason for operator triage. Tests added: TestTruncateRunes, TestRunDailyPush_PrunesDeadSubscribers, TestIsTerminalSendError, TestInfo_DeniedToNonOwner, TestInfo_DeniedToChannelMessageNoFrom, plus owner-allowed counterparts.