fix(worker): fail open when timeseries DB connection fails

[sentry]

This PR addresses OperationalError: (psycopg2.OperationalError) SSL SYSCALL error: EOF detected occurring in app.tasks.upload.UploadFinisher and other timeseries-related tasks.

Root Cause:
The error was traced to transient infrastructure disruptions (e.g., restarts, failovers) of the TimescaleDB instance (prod-timescaledb.codecov.dev). When repository_datasets_query was called, it attempted to establish a new database connection. During this connection setup, SQLAlchemy's on_connect hook would execute a pg_type query, but the SSL connection was abruptly terminated by the server (EOF) before completion.

Problem:
Since the timeseries data collection is a non-critical, optional step, a transient TimescaleDB unavailability should not cause the entire UploadFinisher task (or other related tasks) to fail.

Solution:
Implemented try/except blocks around calls to repository_datasets_query in the following files:

• apps/worker/tasks/upload_finisher.py
• apps/worker/tasks/save_commit_measurements.py
• apps/worker/services/bundle_analysis/report.py

If an OperationalError (or any Exception) occurs during the timeseries dataset query, a warning is logged, and the task proceeds without attempting to save timeseries measurements. This ensures that critical worker tasks can complete successfully even if the timeseries database experiences momentary unavailability, making the system more resilient.

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Fixes WORKER-Z5F

[codecov-notifications]

Codecov Report

❌ Patch coverage is 26.66667% with 11 lines in your changes missing coverage. Please review.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
apps/worker/tasks/save_commit_measurements.py	0.00%	5 Missing ⚠️
apps/worker/services/bundle_analysis/report.py	40.00%	3 Missing ⚠️
apps/worker/tasks/upload_finisher.py	40.00%	3 Missing ⚠️

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[codecov]

Codecov Report

❌ Patch coverage is 26.66667% with 11 lines in your changes missing coverage. Please review.
✅ Project coverage is 91.81%. Comparing base (d8942db) to head (2ce5242).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
apps/worker/tasks/save_commit_measurements.py	0.00%	5 Missing ⚠️
apps/worker/services/bundle_analysis/report.py	40.00%	3 Missing ⚠️
apps/worker/tasks/upload_finisher.py	40.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1869      +/-   ##
==========================================
- Coverage   91.83%   91.81%   -0.02%     
==========================================
  Files        1332     1332              
  Lines       51830    51842      +12     
  Branches     1647     1647              
==========================================
+ Hits        47598    47600       +2     
- Misses       3911     3921      +10     
  Partials      321      321              

Flag	Coverage Δ
workerintegration	58.47% <0.00%> (-0.05%)	⬇️
workerunit	90.34% <26.66%> (-0.06%)	⬇️

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