fix(api): replace deprecated log.warn() with log.warning()

[shafeeq27edu-ai]

Description

logging.warn() is deprecated since Python 3.3 and will be removed in future Python versions. This PR auto-fixes all occurrences across the API codebase using ruff --select G010.

Summary

What changed? Replaced all log.warn() calls with log.warning() across api/oss/src/ and api/ee/src/.

Why was this change needed? logging.warn() is a deprecated alias for logging.warning(). Using it generates deprecation warnings and will break when Python removes the alias.

What problem does it solve? Eliminates ~30+ uses of a deprecated API, ensuring forward compatibility with future Python versions.

How the change addresses the root cause: ruff --select G010 automatically identifies and replaces the deprecated calls with the correct method name. No logic changes — only method name updates.

Testing

Verified locally

• Ran ruff check --select G010 oss/src/ ee/src/ — zero errors after fix
• Ran ruff check oss/src/ ee/src/ — no new lint errors introduced
• Ran ruff format --check oss/src/ ee/src/ — no formatting issues introduced

Added or updated tests

N/A — This is a deprecation compliance fix with no behavior change. Existing logging tests cover the functional path.

QA follow-up

N/A — The fix is self-contained and verified by static analysis.

Demo

BEFORE FIX :

AFTER FIX :

Checklist

• I have included a video or screen recording for UI changes, or marked Demo as N/A
• Relevant tests pass locally
• Relevant linting and formatting pass locally
• I have signed the CLA, or I will sign it when the bot prompts me

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[github-actions]

✅ Thanks @shafeeq27edu-ai! This PR now meets the contribution requirements and has been reopened. A maintainer will review it soon.

[coderabbitai]

📝 Walkthrough

Summary by CodeRabbit

• Refactor
  • Updated warning logs across billing, access, tracing, caching, integrations, and background processing to use the current logging method.
  • Preserved existing application behavior, error handling, responses, and control flow.

Walkthrough

This change replaces deprecated log.warn calls with log.warning across EE and OSS routers, services, utilities, middleware, storage, and tracing code. Control flow, exception handling, responses, and data processing remain unchanged.

Changes

Warning logger migration

Layer / File(s)	Summary
EE warning calls api/ee/src/apis/fastapi/billing/router.py, api/ee/src/apis/fastapi/events/router.py, api/ee/src/apis/fastapi/sessions/records/router.py, api/ee/src/apis/fastapi/spans/router.py, api/ee/src/core/meters/service.py, api/ee/src/core/subscriptions/service.py, api/ee/src/dbs/postgres/meters/dao.py	EE warning logs now use log.warning.
OSS API warning calls api/oss/src/apis/fastapi/access/router.py, api/oss/src/apis/fastapi/*/utils.py, api/oss/src/apis/fastapi/otlp/**, api/oss/src/apis/fastapi/tracing/utils.py	OSS API and OTLP warning logs now use log.warning.
OSS core warning calls api/oss/src/core/**, api/oss/src/dbs/postgres/blobs/dao.py, api/oss/src/middlewares/auth.py, api/oss/src/services/commoners.py, api/oss/src/utils/**	Core services, persistence, middleware, caching, exception handling, lazy loading, and locking logs now use log.warning.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Merge Risk: 🔵 Low · up to c2a62

One authentication-path log.warn(...) call remains and may continue producing deprecation warnings or become incompatible with a future Python version. The fix is localized, so the PR is mergeable with explicit owner follow-up to replace it.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the replacement of deprecated log.warn() calls with log.warning().
Description check	✅ Passed	The description accurately explains the deprecation fix, affected API paths, rationale, testing, and absence of behavior changes.
Docstring Coverage	✅ Passed	Docstring check was indeterminate for this PR — some files could not be analyzed in time. Not blocking.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches 💡 1

🛠️ Fix failing CI checks 💡

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[coderabbitai]

Actionable comments posted: 1

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Repository YAML (base), Organization UI (inherited)

Review profile: CHILL

Plan: Pro Plus

Run ID: bbfed65e-98ae-4bf9-82bc-2a20c9d3f6ec

📥 Commits

Reviewing files that changed from the base of the PR and between 753af38 and c2a6251.

📒 Files selected for processing (29)

• api/ee/src/apis/fastapi/billing/router.py
• api/ee/src/apis/fastapi/events/router.py
• api/ee/src/apis/fastapi/sessions/records/router.py
• api/ee/src/apis/fastapi/spans/router.py
• api/ee/src/core/meters/service.py
• api/ee/src/core/subscriptions/service.py
• api/ee/src/dbs/postgres/meters/dao.py
• api/oss/src/apis/fastapi/access/router.py
• api/oss/src/apis/fastapi/applications/utils.py
• api/oss/src/apis/fastapi/environments/utils.py
• api/oss/src/apis/fastapi/evaluators/utils.py
• api/oss/src/apis/fastapi/otlp/extractors/adapters/openinference_adapter.py
• api/oss/src/apis/fastapi/otlp/extractors/adapters/openllmetry_adapter.py
• api/oss/src/apis/fastapi/otlp/extractors/span_data_builders.py
• api/oss/src/apis/fastapi/otlp/extractors/span_processor.py
• api/oss/src/apis/fastapi/otlp/opentelemetry/otlp.py
• api/oss/src/apis/fastapi/queries/utils.py
• api/oss/src/apis/fastapi/testsets/utils.py
• api/oss/src/apis/fastapi/tracing/utils.py
• api/oss/src/apis/fastapi/workflows/utils.py
• api/oss/src/core/evaluations/service.py
• api/oss/src/core/tracing/utils/trees.py
• api/oss/src/dbs/postgres/blobs/dao.py
• api/oss/src/middlewares/auth.py
• api/oss/src/services/commoners.py
• api/oss/src/utils/caching.py
• api/oss/src/utils/exceptions.py
• api/oss/src/utils/lazy.py
• api/oss/src/utils/locking.py

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