Update inactivity_timeout to integer type with min/max constraints

[devin-ai-integration]

Summary

Updates the inactivity_timeout parameter in the Streaming API specification (usm-streaming.yml) to correctly document it as an integer type with minimum value of 5 and maximum value of 3600 seconds.

Changes:

• Added explicit schema with type: integer, minimum: 5, maximum: 3600
• Changed examples from strings ("5", "3600") to integers (5, 3600)

Review & Testing Checklist for Human

• Verify the minimum (5) and maximum (3600) values are correct for the inactivity_timeout parameter
• Preview the API reference page at /docs/api-reference/streaming-api/streaming-api#request.query.inactivity_timeout to confirm the type shows as integer and min/max constraints are displayed correctly

Notes

• Link to Devin run: https://app.devin.ai/sessions/3d24f753bd2d4306bbac174cdaf83aa8
• Requested by: Lee Vaughn (@LeeVaughn)

[devin-ai-integration]

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