feat(sdk): add httpx instrumentation support

[Jwrede]

Summary

Closes #2283

Adds httpx instrumentation to the traceloop SDK, allowing automatic tracing of outbound HTTP calls made via httpx. This mirrors the existing requests and urllib3 instrumentation already supported by the SDK.

Changes

• Added HTTPX = "httpx" enum value to Instruments
• Added init_httpx_instrumentor() function using HTTPXClientInstrumentor with excluded_urls filtering (same as requests/urllib3)
• Added the elif dispatch branch in the instrumentor initialization loop
• Added opentelemetry-instrumentation-httpx>=0.59b0 dependency to pyproject.toml

Test plan

• Verified Python syntax parses correctly
• CI passes with new dependency
• Manual verification: import traceloop SDK with httpx installed, confirm HTTPXClientInstrumentor activates

Summary by CodeRabbit

• New Features
  • Added support for instrumenting the HTTPX HTTP client library, enabling automatic tracing of HTTPX requests within the SDK.

[CLAassistant]

All committers have signed the CLA.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 4ea35c43-f951-487f-8208-a4efcd6d1c75

📥 Commits

Reviewing files that changed from the base of the PR and between abbcc11 and 1907e37.

📒 Files selected for processing (3)

• packages/traceloop-sdk/pyproject.toml
• packages/traceloop-sdk/traceloop/sdk/instruments.py
• packages/traceloop-sdk/traceloop/sdk/tracing/tracing.py

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📝 Walkthrough

Walkthrough

Added HTTPX instrumentation support to the Traceloop SDK by introducing a new HTTPX enum member, adding the opentelemetry-instrumentation-httpx dependency, and implementing an init_httpx_instrumentor() function that conditionally initializes the HTTPXClientInstrumentor with excluded URL filtering.

Changes

HTTPX Instrumentation Support

Layer / File(s)	Summary
Enum Definition packages/traceloop-sdk/traceloop/sdk/instruments.py	Added HTTPX = "httpx" enum member to Instruments for identifying HTTPX as a supported instrumentation target.
Dependency Declaration packages/traceloop-sdk/pyproject.toml	Added opentelemetry-instrumentation-httpx>=0.59b0 to project dependencies alongside other OpenTelemetry instrumentation packages.
Initialization Logic packages/traceloop-sdk/traceloop/sdk/tracing/tracing.py	Implemented init_httpx_instrumentor() function that detects HTTPX availability, instantiates HTTPXClientInstrumentor, configures it with EXCLUDED_URLS, and handles errors gracefully. Wired into init_instrumentations() method to handle Instruments.HTTPX selection.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

🐰 A hop, skip, and bound through async land,
HTTPX now in paw, so grand!
No more just requests and urllib's way,
This rabbit traces async all day! ✨

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'feat(sdk): add httpx instrumentation support' accurately and concisely summarizes the main change of adding HTTPX support to the SDK's instrumentation.
Linked Issues check	✅ Passed	The pull request fully implements the requirements from #2283: adding HTTPX to Instruments enum, creating init_httpx_instrumentor() with excluded_urls support, and adding the required dependency.
Out of Scope Changes check	✅ Passed	All changes in the pull request are directly scoped to implementing HTTPX instrumentation support as specified in #2283; no unrelated modifications were introduced.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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