Quick wins: fix health check, 400 responses, logging, perf, and compatibility#45

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JoshCap20 merged 11 commits into

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fix/quick-wins-batch

Feb 25, 2026

Commits on Feb 25, 2026

fix: only intercept relative /health, forward absolute URLs to upstream
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refactor: simplify read_line_bounded return type to Result<()>
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chore: downgrade Rust edition from 2024 to 2021 for broader compatibility
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fix: return 400 Bad Request for malformed request lines
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fix: remove misleading DNS rebinding label from log messages
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perf: write status line directly to writer, eliminating per-response String allocation
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perf: return &str from parse_host_port, eliminating per-CONNECT String allocations
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revert: restore build_proxy_status_line with format!(), drop itoa dependency
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refactor: normalize error response constants naming and style
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test: add integration tests for 400 Bad Request on malformed input
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style: add comment explaining best-effort write in 400 handler
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