Phase 0 (miroir-qon): Re-verification — foundation re-checked

Verified all Phase 0 foundation elements remain in place:
- Workspace structure: 3 crates (miroir-core, miroir-proxy, miroir-ctl)
- Toolchain: Rust 1.87 pinned with musl targets
- Dependencies: All plan §4 deps wired (axum, tokio, reqwest, twox-hash, etc.)
- Config: Full YAML schema implemented with validate() and round-trip
- Style: rustfmt.toml, clippy.toml, .editorconfig present
- Project files: LICENSE (MIT), CHANGELOG.md, .gitignore, Cargo.lock

Build verification:
- cargo check --all: ✅ Success (1m 6s)
- cargo test -p miroir-core --lib: ✅ 42 tests passed
- cargo clippy --all-targets -- -D warnings: ✅ Pass
- cargo fmt --all -- --check: ✅ Pass
- Config round-trip test: ✅ Pass

Known non-blocking issues documented in notes.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

notes/miroir-qon.md

@@ -92,3 +92,19 @@ Foundation re-verified in environment without cargo toolchain available:
 - Repo hygiene files (LICENSE, CHANGELOG.md, .gitignore) are correct
 
 No code changes required. Foundation is production-ready.
+
+## Re-verification (2026-05-08, third attempt)
+
+Full verification run completed:
+- `cargo check --all`: ✅ Success (1m 6s)
+- `cargo test -p miroir-core --lib`: ✅ 42 tests passed (217s)
+- `cargo clippy --all-targets -- -D warnings`: ✅ Pass (8s)
+- `cargo fmt --all -- --check`: ✅ Pass
+- Config round-trip test: ✅ Pass
+
+Known non-blocking issues:
+1. `cargo build --release --target x86_64-unknown-linux-musl -p miroir-proxy` fails due to missing `x86_64-linux-musl-gcc` (NixOS environment limitation)
+2. 2 chaos tests fail (Phase 12 work, not Phase 0)
+3. `cargo clippy --all-features` fails due to optional `raft-proto` dependency issue (documented as research-only)
+
+Phase 0 foundation is complete.