fix(api): Only emit API mismatch warnings when client is active

[sentrivana]

Description

When working on the dogfooding branch in Sentry, I've seen warnings emitted about using span streaming API in non streaming mode when that was not the case. The problem is that when the SDK has not been init-ed yet and you use e.g. the new streaming @trace decorator, has_span_streaming_enabled() will return False and it'll appear as though you're using the streaming API in non-streaming mode.

Check whether the SDK/client has actually been initialized before emitting any warnings.

Issues

Reminders

• Please add tests to validate your changes, and lint your code using uv run ruff.
• Add GH Issue ID & Linear ID (if applicable)
• PR title should use conventional commit style (feat:, fix:, ref:, meta:)
• For external contributors: CONTRIBUTING.md, Sentry SDK development docs, Discord community

[github-actions]

Codecov Results 📊

✅ 88776 passed | ⏭️ 6025 skipped | Total: 94801 | Pass Rate: 93.64% | Execution Time: 297m 5s

📊 Comparison with Base Branch

Metric	Change
Total Tests	📈 +713
Passed Tests	📈 +723
Failed Tests	📉 -10
Skipped Tests	—

➖ Removed Tests (10)

View removed tests

• test_clickhouse_client_breadcrumbs
  • File: tests.integrations.clickhouse_driver.test_clickhouse_driver
• test_clickhouse_client_breadcrumbs_with_pii
  • File: tests.integrations.clickhouse_driver.test_clickhouse_driver
• test_clickhouse_client_spans
  • File: tests.integrations.clickhouse_driver.test_clickhouse_driver
• test_clickhouse_spans_with_generator
  • File: tests.integrations.clickhouse_driver.test_clickhouse_driver
• test_clickhouse_client_spans_with_pii
  • File: tests.integrations.clickhouse_driver.test_clickhouse_driver
• test_clickhouse_dbapi_breadcrumbs
  • File: tests.integrations.clickhouse_driver.test_clickhouse_driver
• test_clickhouse_dbapi_breadcrumbs_with_pii
  • File: tests.integrations.clickhouse_driver.test_clickhouse_driver
• test_clickhouse_dbapi_spans
  • File: tests.integrations.clickhouse_driver.test_clickhouse_driver
• test_clickhouse_dbapi_spans_with_pii
  • File: tests.integrations.clickhouse_driver.test_clickhouse_driver
• test_span_origin
  • File: tests.integrations.clickhouse_driver.test_clickhouse_driver

All tests are passing successfully.

✅ Patch coverage is 100.00%. Project has 2362 uncovered lines.
✅ Project coverage is 89.87%. Comparing base (base) to head (head).

Files with missing lines (2)

File	Patch %	Lines
sentry_sdk/tracing_utils.py	100.00%	⚠️ 2 partials
sentry_sdk/traces.py	100.00%	⚠️ 1 partials

Coverage diff

@@            Coverage Diff             @@
##          main       #PR       +/-##
==========================================
+ Coverage    89.87%    89.87%        —%
==========================================
  Files          192       192         —
  Lines        23320     23321        +1
  Branches      8020      8020         —
==========================================
+ Hits         20958     20959        +1
- Misses        2362      2362         —
- Partials      1327      1327         —

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