Add request timeout middleware

[meshackyaro]

Description

No request timeout configured. Long-running requests can exhaust server resources.

Component

Backend

Difficulty

🟢 Easy

Tasks

• Add request timeout middleware
• Configure reasonable timeout (30s)
• Return 408 Request Timeout
• Make timeout configurable
• Test timeout behavior

Acceptance Criteria

• Requests timeout after configured duration
• Clear timeout error returned
• Resources freed on timeout

Estimated Time

1 day