Refresh Rust maintenance inventory

[beiwei30]

Summary

• inventory Rust maintenance candidates against exact current head daa1f04, including 57 production task sites, current error/redaction boundaries, 174 semantic numeric diagnostics, and bounded P3-02 through P3-05 handoffs
• make scripts/rust-maintenance-report.py deterministic when one shared source location is compiled into multiple integration-test targets, and record origin/main plus the report-script version
• mark the runtime-risk report as a historical abcc9b5 snapshot and correct its stale all-target unwrap split

This is an audit and planning slice only. It does not change production Rust, protocol DTOs, tests, fixtures, snapshots, goldens, transcripts, or public behavior.

Verification

• scripts/rust-maintenance-report.py > /tmp/orbcode-rust-maintenance-current-head-1.md
• scripts/rust-maintenance-report.py > /tmp/orbcode-rust-maintenance-current-head-2.md
• diff -u /tmp/orbcode-rust-maintenance-current-head-1.md /tmp/orbcode-rust-maintenance-current-head-2.md
  • both reports: SHA-256 c792588f4d4121c34d0e217269288a2e3463cd6c6e52b2e78fd812c23e483e01
• cargo fmt --all --check
• cargo clippy --workspace --all-targets -- -D warnings
• cargo check --workspace
• scripts/check-docs.sh
• scripts/audit-public-surface.sh
• scripts/audit-brand.sh
• git diff --check

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