Update log messages in the session pools

[alex268]

No description provided.

[Copilot]

Pull request overview

Note

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Updates session pool logging to improve signal/noise and add visibility into key lifecycle events (broken sessions and idle-timeout removals).

Changes:

• Downgrade some high-frequency logs from debug to trace in table SessionPool.
• Add new debug logs when sessions become broken (table) and when sessions are removed due to idle timeout (table/query).
• Fix typo in query session close log message (“broke” → “broken”).

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
table/src/main/java/tech/ydb/table/impl/pool/StatefulSession.java	Adds debug logs when a session transitions to broken/needs-shutdown due to status/shutdown hint.
table/src/main/java/tech/ydb/table/impl/pool/SessionPool.java	Lowers verbosity for acquire/accept logs; adds idle-timeout removal log.
query/src/main/java/tech/ydb/query/impl/SessionPool.java	Fixes close log typo; adds idle-timeout removal log.

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[codecov-commenter]

Codecov Report

❌ Patch coverage is 85.71429% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 71.24%. Comparing base (a422551) to head (d02fb60).

Files with missing lines	Patch %	Lines
...src/main/java/tech/ydb/query/impl/SessionPool.java	50.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #650      +/-   ##
============================================
- Coverage     71.32%   71.24%   -0.09%     
+ Complexity     3364     3361       -3     
============================================
  Files           379      379              
  Lines         15916    15920       +4     
  Branches       1669     1669              
============================================
- Hits          11352    11342      -10     
- Misses         3914     3923       +9     
- Partials        650      655       +5     

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