feat(validation): add IQ/OQ/PQ validation workflows and tests

[RichardHightower]

Summary

Complete implementation of the IQ/OQ/PQ validation framework, adding GitHub Actions workflows, memory tests, and evidence collection automation.

Issues Closed

• Closes Create GitHub Actions IQ Workflow for Cross-Platform Validation #57 - Create GitHub Actions IQ Workflow for Cross-Platform Validation
• Closes Create Combined IQ/OQ/PQ Validation Workflow #58 - Create Combined IQ/OQ/PQ Validation Workflow
• Closes Add Memory Usage PQ Tests #61 - Add Memory Usage PQ Tests
• Closes Create Evidence Collection Scripts for IQ/OQ/PQ #62 - Create Evidence Collection Scripts

Changes

GitHub Actions Workflows

.github/workflows/iq-validation.yml - Cross-platform IQ testing:

• macOS ARM64 (macos-14)
• macOS Intel (macos-13)
• Linux (ubuntu-latest)
• Windows (windows-latest)
• Evidence collection and artifact upload

.github/workflows/validation.yml - Combined IQ/OQ/PQ validation:

• Orchestrates IQ → OQ → PQ sequence
• Dependencies enforce phase ordering
• Generates validation report artifact
• Release gate functionality

Memory PQ Tests

cch_cli/tests/pq_memory.rs - 4 new tests:

• test_pq_memory_baseline - Idle memory < 10MB
• test_pq_memory_under_load - Memory during event processing
• test_pq_memory_stability - No memory growth over time
• test_pq_binary_size - Binary < 10MB

Evidence Collection Scripts

Script	Purpose
scripts/collect-iq-evidence.sh	IQ tests + environment info
scripts/collect-oq-evidence.sh	OQ test suites
scripts/collect-pq-evidence.sh	PQ benchmarks + metrics
scripts/generate-validation-report.sh	Combined report

Taskfile Tasks

task collect-iq      # Collect IQ evidence
task collect-oq      # Collect OQ evidence
task collect-pq      # Collect PQ evidence
task collect-all     # All evidence + report
task validation-report  # Generate report

GAPs Resolved

GAP	Description	Resolution
GAP-002	No CI/CD workflow	✅ iq-validation.yml, validation.yml
GAP-004	No memory tests	✅ pq_memory.rs
GAP-006	Limited cross-platform	✅ 4-platform CI
GAP-007	No evidence automation	✅ collect-*.sh scripts

Testing

• All 61 tests pass (cargo test)
• cargo clippy passes
• cargo fmt --check passes
• Shell script syntax verified (bash -n)
• New memory tests pass on macOS

Evidence Output Structure

docs/validation/
├── iq/YYYY-MM-DD/
│   ├── report.md
│   ├── environment.md
│   ├── build.log
│   └── iq-tests.log
├── oq/YYYY-MM-DD/
│   ├── report.md
│   └── test-cases/
├── pq/YYYY-MM-DD/
│   ├── report.md
│   ├── binary-info.md
│   └── cold-start-benchmark.md
└── sign-off/
    └── validation-report-YYYY-MM-DD.md