fix: do not pick compacting/expired files

[evenyag]

I hereby agree to the terms of the GreptimeDB CLA.

Refer to a related PR or issue link (optional)

What's changed and what's your intention?

This PR fixes that twcs compaction picker may pick expired files to compact.

We already set the compacting here:

greptimedb/src/mito2/src/compaction/twcs.rs

Lines 218 to 222 in 22a662f

	if !expired_ssts.is_empty() {
	info!("Expired SSTs in region {}: {:?}", region_id, expired_ssts);
	// here we mark expired SSTs as compacting to avoid them being picked.
	expired_ssts.iter().for_each(|f| f.set_compacting(true));
	}

Checklist

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.
• This PR requires documentation updates.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.81%. Comparing base (22a662f) to head (1de52c6).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4955      +/-   ##
==========================================
- Coverage   84.04%   83.81%   -0.24%     
==========================================
  Files        1142     1142              
  Lines      211473   211509      +36     
==========================================
- Hits       177740   177269     -471     
- Misses      33733    34240     +507     

[waynexia]

LGTM, but where do you check if a file is expired?

[v0y4g3r]

LGTM

[evenyag]

LGTM, but where do you check if a file is expired?

Here:

greptimedb/src/mito2/src/compaction/twcs.rs

Lines 216 to 217 in 22a662f

	let expired_ssts =
	get_expired_ssts(levels, compaction_region.ttl, Timestamp::current_millis());