Lei, HUANG 5fe17531ee feat: update flow windows after metric batch flush (#8544) ...

## Summary

- Add post-flush dirty-window notifications for metric writes through
`PendingRowsBatcher`, so batching-mode flows are updated when Prometheus
remote write uses the pending-row batcher path.
- Notifications fire only after the entire physical flush succeeds;
failed flushes (including partial region failures) send no notification.
Notification errors are best-effort and never affect the persisted write
result.
- Optimize timestamp extraction with a null-free fast path
(`extend_from_slice(values())`) and a nullable fallback
(`iter().flatten()`).
- Refactor notifier to take ownership of `Vec<TableBatch>`, eliminating
the per-flush vector clone.
- Key `PendingBatch` by logical `TableId` to prevent same-name
drop/recreate merging within one flush interval.

## Known follow-ups (from self-review)

- Per-peer `Vec<i64>` clone in notifier could use `Arc<Vec<i64>>`;
intentionally deferred as the cost is negligible for typical peer
counts.
- No integration/sqlness test for end-to-end flow notification through
the batcher.
- Cache lookup `Err` path and multi-table flush path lack dedicated unit
tests.

## Test Plan

- [x] `cargo nextest run -p servers --lib --retries 0` — 293 tests pass
- [x] `cargo fmt --all -- --check`
- [x] `cargo check -p servers -p frontend -p operator -p
tests-integration`
- [x] `git diff --check`

2026-07-22 13:09:30 +00:00

..

grpc.rs

feat: global switch for creating tables automatically (#8203)

2026-05-31 23:51:14 +00:00

http.rs

feat: update flow windows after metric batch flush (#8544)

2026-07-22 13:09:30 +00:00

json2.rs

fix(mito): failed to compact memtable with json2 (#8297)

2026-06-26 08:52:06 +00:00

jsonbench.rs

feat(json2): type hint (#8247)

2026-06-30 07:37:31 +00:00

main.rs

fix(mito): failed to compact memtable with json2 (#8297)

2026-06-26 08:52:06 +00:00

mysql.rs

fix: mysql prepare correctly returns error instead of panic (#7963)

2026-04-15 01:59:16 +00:00

region_migration.rs

refactor: SQL and gRPC server handlers (#7637)

2026-01-30 07:19:45 +00:00

repartition_expr_version.rs

refactor: rename partition rule version to partition expr version (#7696)

2026-02-10 10:12:47 +00:00

repartition.rs

fix: require metasrv GC for repartition (#8497)

2026-07-14 12:04:03 +00:00

sql.rs

fix: reject out-of-range PostgreSQL numeric UInt64 (#8517)

2026-07-15 02:05:15 +00:00