CRG blitz D→C: comprehensive test coverage for presswerk

Add 182 passing tests across all CRG C requirements:
- 40 unit tests (types, config, error modules)
- 16 end-to-end tests (publishing workflows, serialization)
- 13 property-based tests (proptest invariants)
- 21 aspect/security/contract tests (injection, traversal, invariants)
- 20+ criterion benchmarks (configuration, job operations, serialization)
- 92 existing tests (security, document, print crates)

Fixed syntax errors in doc comments (bridge, document, security crates).
All tests pass (100%), no warnings. Benchmarks baselined for CI/CD.

Grade achieved: C (comprehensive test coverage)
Tests: 182 passing
Pass rate: 100%

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: hyperpolymath