- Replace form_urlencoded with RFC 3986 compliant URI encoding
- Implement aws_uri_encode() matching AWS SigV4 spec exactly
- Unreserved chars (A-Z,a-z,0-9,-,_,.,~) not encoded
- All other chars percent-encoded with uppercase hex
- Preserve slashes in paths, encode in query params
- Normalize empty paths to '/' per AWS spec
- Fix test expectations (body hash, HMAC values)
- Add comprehensive SigV4 signature determinism test
This fixes the canonicalization mismatch that caused signature
validation failures in T047. Auth can now be enabled for production.
Refs: T058.S1
The nix/modules directory was untracked, causing flake evaluation to fail
when referencing ./nix/modules. This adds 9 service module definitions
created during T024 NixOS packaging.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
