Merge release_v2.3.34 with hotfixes

[alex268]

No description provided.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 76.92308% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 71.56%. Comparing base (3797fc2) to head (179b1d1).

Files with missing lines	Patch %	Lines
...src/main/java/tech/ydb/table/impl/BaseSession.java	76.92%	1 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #664      +/-   ##
============================================
+ Coverage     71.44%   71.56%   +0.12%     
- Complexity     3404     3413       +9     
============================================
  Files           385      385              
  Lines         16064    16064              
  Branches       1684     1686       +2     
============================================
+ Hits          11477    11497      +20     
+ Misses         3930     3911      -19     
+ Partials        657      656       -1     

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[Copilot]

Pull request overview

This PR merges the release_v2.3.34 hotfixes, primarily addressing CreateTable column-family mapping (compression + storage pool) and adding regression tests to ensure tables can be described and re-created from their description without losing column-family settings.

Changes:

• Table: Fix CreateTable column-family mapping to handle nullable compression/storage pool fields and to include the default family in requests.
• Tests: Add an integration test that creates a table, describes it, and re-creates a copy from the described TableDescription, validating column-family compression mapping.
• Docs/cleanup: Update CHANGELOG.md for 2.3.34 and remove stale commented/blank lines in tests.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
table/src/main/java/tech/ydb/table/impl/BaseSession.java	Fix column-family protobuf mapping (compression/storage pool) and always include all families when creating tables.
table/src/test/java/tech/ydb/table/integration/DescribeTableTest.java	Add regression coverage for table copy via describeTable and column-family compression behavior.
table/src/test/java/tech/ydb/table/impl/BaseSessionTest.java	Add a unit-level guard intended to lock enum constants for compression mapping (currently needs a small fix to execute).
table/src/test/java/tech/ydb/table/impl/pool/FutureHelper.java	Remove stray trailing whitespace-only lines.
query/src/test/java/tech/ydb/query/impl/QueryIntegrationTest.java	Remove a commented-out assertion fragment.
CHANGELOG.md	Add 2.3.34 release notes describing the hotfixes.

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