fix: exclude internal streams from datasets api

[nikhilsinhaparseable]

Summary by CodeRabbit

• Bug Fixes
  • Fixed an issue where internal streams were being incorrectly included in dataset responses.

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Walkthrough

Adds a guard in PrismDatasetRequest::process_stream to skip processing internal streams by querying the stream type via PARSEABLE and returning None if the stream is classified as Internal. This prevents building dataset responses for internal streams.

Changes

Cohort / File(s)	Summary
Internal stream filtering src/prism/logstream/mod.rs	Adds a guard condition to skip internal streams during dataset request processing by checking stream type and returning early if detected.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Poem

🐰 Internal streams now take a rest,
No need to process every test,
A simple guard, so quick and neat,
Makes dataset handling more discreet! 🌊✨

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The pull request description is completely missing. The template requires description, solution rationale, key changes, and testing/documentation checkboxes.	Add a comprehensive description explaining the issue, why internal streams should be excluded, what was changed, and confirm testing and documentation requirements were met.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: excluding internal streams from the datasets API, which aligns with the code modification that adds a guard to skip processing internal streams.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing touches

• 📝 Generate docstrings

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