Add boundary-preserving request path source

[patchstackdave]

Summary

• Add server.REQUEST_PATH in contract 2.12: separate query/fragment before one percent-decoding pass, preserving path data without generic text or filesystem normalization.
• Preserve the original Node request target; keep existing URI and route-scope behavior unchanged. Document Fetch platform canonicalization limits.
• Advertise X-Patchstack-Request-Path: 1 on authenticated rules requests so the rules service can withhold incompatible rules from older runtimes.

Validation

• Typecheck, template typecheck and build pass.
• Protection suite: 142 files, 2,692 tests pass.
• Contract artifact check passes; focused contract/source/client tests pass.
• Synthetic fixtures cover encoded delimiters, query controls, single decoding, invalid escapes, dot segments, mounted URLs, inherited fields, Node and Fetch adapters.

Rollout

Deploy capability-aware rules delivery before distributing rules using this source. Older runtimes must not receive those rules. No existing rule semantics change.

Public-boundary review: only public contract details and synthetic fixtures; no private advisory artifacts or deployment information.

[coderbuds]

Well-structured feature with clear implementation and comprehensive tests.

🎯 Quality: 100% Elite · 📦 Size: Medium

📈 This month: Your 194th PR — above team average · Averaging Good

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[patchstackdave]

/review