fix: surface FileObject session errors; align commit/rollback semantics

[barapa]

• Previously save/delete failures were only logged, so callers believed commits succeeded when storage ops had already failed.
• Sync commit: processes saves sequentially, then deletes. Logs failures with tracebacks and re-raises. Ignores FileNotFoundError on delete. Stops on first save error. Clears internal state only on full success.
• Async commit: runs saves and deletes concurrently via asyncio.gather. Logs each failure with exc_info. Raises the first real Exception, and lets BaseException (e.g., CancelledError) bubble. Attempts deletes even if a save fails. Clears state only on full success.
• Rollback (sync/async): deletes only files saved during the current transaction. Ignores FileNotFoundError. Logs and re-raises other errors. Clears state after processing.
• Tracking: records successful saves in _saved_in_transaction for targeted rollback cleanup; state is retained on error to allow inspection/retry.

Tests

• Sync/async save and delete error paths, including FileNotFoundError handling and BaseException bubbling.
• Override semantics: save cancels prior delete; delete cancels prior save.
• State behavior: clear on success; retain on error.
• Async specifics: delete still attempted even if a save fails; raises first failing Exception in input order; logs include exc_info for stack traces.

[barapa]

Paraphrasing @Harshal6927:
With this change, errors are now raised on failed uploads. So this should be considered a breaking change.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 72.60274% with 20 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.19%. Comparing base (453f695) to head (fc94289).

Files with missing lines	Patch %	Lines
...anced_alchemy/types/file_object/session_tracker.py	72.05%	10 Missing and 9 partials ⚠️
advanced_alchemy/_listeners.py	80.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #580      +/-   ##
==========================================
+ Coverage   79.48%   80.19%   +0.71%     
==========================================
  Files          87       87              
  Lines        6346     6383      +37     
  Branches      807      821      +14     
==========================================
+ Hits         5044     5119      +75     
+ Misses       1051     1002      -49     
- Partials      251      262      +11     

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[github-actions]

Documentation preview will be available shortly at https://litestar-org.github.io/advanced-alchemy-docs-preview/580