fix: SDK usage statistics tracking for vision-agents

[tjirab]

Summary

• Add stream- prefix to user_agent so vision-agents API calls are tracked in SDK usage statistics
• The chat backend's SDK stats collector requires the X-Stream-Client header to match the pattern stream-*-MAJOR.MINOR.PATCH
• Previously vision-agents-{version} was used, which didn't match and was silently ignored

Details

The X-Stream-Client header is parsed by chat/server/sdkstats/sdk_stats.go using regex:

^(stream-[a-zA-Z\-]+)-v?(\d+)\.(\d+)\.(\d+)

This change updates the user agent from vision-agents-1.0.0 to stream-vision-agents-1.0.0 so it matches the expected pattern.

Test plan

• Verify API calls from vision-agents appear in SDK usage statistics after deployment

Summary by CodeRabbit

• Chores
  • Updated internal client identification to enhance service compatibility and tracking.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

📝 Walkthrough

Walkthrough

A single-line modification to the StreamEdge initialization updates the AsyncStream client's user_agent identification string from "vision-agents-{version}" to "stream-vision-agents-{version}". No functional or control flow changes are introduced.

Changes

Cohort / File(s)	Summary
StreamEdge User Agent Update plugins/getstream/vision_agents/plugins/getstream/stream_edge_transport.py	Updated AsyncStream client user_agent identifier to include "stream-" prefix for improved API client recognition

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

A nameplate changes, subtle as breath—
from "vision-agents" to "stream-vision-agents,"
identity refined, precision honed,
the self we show the world remade,
one string to bear the weight of knowing.

🚥 Pre-merge checks | ✅ 2 | ❌ 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 (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately reflects the main change: updating the user agent string to enable SDK usage statistics tracking for vision-agents.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing touches

• 📝 Generate docstrings

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