Use cosmos.log.get_logger consistently

[pankajastro]

The rest of the codebase (31 modules) instantiates loggers via cosmos.log.get_logger so messages carry the (astronomer-cosmos) prefix when rich_logging is enabled. A few outliers still used the stdlib logger directly, breaking that branding and bypassing scoped log-level configuration:

• cosmos/operators/_asynchronous/base.py: dropped an unused log = logging.getLogger(__name__) (no callers in-module or via imports).
• cosmos/profiles/snowflake/user_privatekey_file.py: switched logger to get_logger; it is used for the passphrase warning.
• cosmos/dbt/parser/output.py: replaced a module-level logging.error(...) call (which hit the root logger) with a proper logger.error(...) via a module-level get_logger instance.
• cosmos/plugin/airflow3.py: replaced four module-level logging.exception(...) root-logger calls similarly.

closes: #1157

[Copilot]

Pull request overview

This PR standardizes logging across a few remaining outlier modules by switching from stdlib/root logger usage to cosmos.log.get_logger, ensuring log messages consistently include the (astronomer-cosmos) prefix when rich_logging is enabled and participate in Cosmos-scoped log configuration.

Changes:

• Replace stdlib/root logger usage with get_logger(__name__) in modules that emit log messages.
• Remove an unused logging import and unused module-level logger in the async operator factory module.
• Convert module-level logging.exception/error(...) calls to use a module-level Cosmos logger instance.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
cosmos/profiles/snowflake/user_privatekey_file.py	Switches module logger to get_logger for the passphrase warning.
cosmos/plugin/airflow3.py	Introduces a module-level Cosmos logger and replaces root-logger exception calls with logger.exception(...).
cosmos/operators/_asynchronous/base.py	Removes unused stdlib logger setup (logging import and unused log).
cosmos/dbt/parser/output.py	Adds module-level Cosmos logger and replaces a root-logger error call with logger.error(...).

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.02%. Comparing base (f02859b) to head (b0aff0e).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2670   +/-   ##
=======================================
  Coverage   98.02%   98.02%           
=======================================
  Files         105      105           
  Lines        7844     7844           
=======================================
  Hits         7689     7689           
  Misses        155      155           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[tatiana]

Thanks for improving this, @pankajastro ! Would it be worth updating our agents' CLAUDE.md with recommendations on how to instantiate log, so we avoid similar patterns in the future? Happy for this to be addressed in a follow-up PR.

[pankajastro]

Thanks for improving this, @pankajastro ! Would it be worth updating our agents' CLAUDE.md with recommendations on how to instantiate log, so we avoid similar patterns in the future? Happy for this to be addressed in a follow-up PR.

Created PR: #2679