* feat: initial twcs impl
* chore: rename SimplePicker to LeveledPicker
* rename some structs
* Remove Compaction strategy
* make compaction picker a trait object
* make compaction picker configurable for every region
* chore: add some test for ttl
* add some tests
* fix: some style issues in cr
* feat: enable twcs when creating tables
* feat: allow config time window when creating tables
* fix: some cr comments
* feat: add log
* feat: print more info
* feat: use chain reader
* fix: panic on getting first range
* fix: prev not updated
* fix: reverse readers and iter backward
* chore: don't print windows in log
* feat: consider memtable range
Also fix the issue that using incorrect comparision method to sort time
ranges.
* fix: merge memtable window with sst's
* feat: add use_chain_reader option
* feat: skip empty memtables
* chore: change log level
* fix: memtable range not ordered
* style: fix clippy
* chore: address review comments
* chore: print region id in log
* fix: set max_files_in_l0 in unit tests to avoid compaction
* refactor: pass while EngineConfig
* fix: comment out unstable sqlness test
* revert commented sqlness
* add some debug log
* fix: use lazy parquet reader in MitoTable::scan_to_stream to avoid IO in plan stage
* fix: unit tests
* fix: order-by optimization
* add some tests
* fix: move metric names to metrics.rs
* fix: some cr comments
* fix: fix close region issue
* chore: apply suggestion from CR
* chore: apply suggestion from CR
* chore: apply suggestion from CR
* chore: apply suggestion from CR
* refactor: remove close method from Region trait
* chore: remove PartialEq from CloseTableResult
* feat(storage): Add AllocTracker
* feat(storage): flush request wip
* feat(storage): support global write buffer size
* fix(storage): Test and fix size based strategy
* test(storage): Test AllocTracker
* test(storage): Test pick_by_write_buffer_full
* docs: Add flush config example
* test(storage): Test schedule_engine_flush
* feat(storage): Add metrics for write buffer size
* chore(flush): Add log when triggering flush by global buffer
* chore(storage): track allocation in update_stats
* feat: add delete WAL in drop_region
* chore: fix typo err.
* feat: mark all SSTs deleted and remove the region from StorageEngine's region map.
* test: add test_drop_region for StorageEngine.
* chore: make clippy happy
* fix: fix conflict
* chore: CR.
* chore: CR
* chore: fix clippy
* fix: temp file life time
* feat: Add FlushPicker
* feat(storage): Add close to StorageEngine
* style(storage): fix clippy
* feat(storage): Close regions in StorageEngine::close
* chore(storage): Clear requests on scheduler stop
* test(storage): Test flush picker
* feat(storage): Add metrics for auto flush
* feat(storage): Add flush reason and record it in metrics
* feat: Expose flush config
docs(config): Update config example
* refactor(storage): Run auto flush task in FlushScheduler
* refactor(storage): Add FlushItem trait to make FlushPicker easy to test
* feat: add storage engine region count gauge
* test: remove catalog metrics because we can't get a correct number
* feat: add metrics for log store write and compaction
* fix: address review issues
* test: simplify countdownlatch
* feat: impl Drop for LocalScheduler
* feat(storage): Impl FlushRequest and FlushHandler
* feat(storage): Use scheduler to handle flush job
* chore(storage): remove unused code
* feat(storage): Use new type pattern for RegionMap
* feat(storage): Remove on_success callback
* feat(storage): Address CR comments and add some metrics to flush
* test(storage): use assert_eq to check scan result
* feat(storage): Add more info to manifest log
* feat: Avoid error log when unable to delete
* fix: The manifest gc task should delete files <= last_version
* feat(storage): Don't log if the error kind is not found
* feat: Add keep_last_checkpoint option
