chore: clean up root directory and consolidate documentation

Remove obsolete documentation files and consolidate into docs/ directory. Remove redundant test scripts (functionality will be folded into run.sh). Update AGENTS.md with SDLC workflow. Update PRD.md with tier0 architecture clarification. Update README.md to reflect clean directory structure.

Changes:
- Delete: BUILD-COMPLETE.md, BUILD-SUMMARY.md, RESUME.md, SESSION-CLOSED.md
- Delete: FINAL-SECURITY-COMPLIANCE-REPORT.md, QUICK_START.md, JOURNAL.md
- Move: TEST-COVERAGE.md, VERIFICATION-REPORT.md to docs/
- Delete: test-iso.sh, test-runner.sh (will fold into run.sh)
- Update: AGENTS.md with SDLC workflow section
- Update: PRD.md with tier0 architecture clarification and diagram
- Update: README.md to reflect clean directory structure

Root directory now contains only: AGENTS.md, README.md, PRD.md, Dockerfile, run.sh

💘 Generated with Crush

Assisted-by: GLM-4.7 via Crush <crush@charm.land>

tests/unit/encryption-setup_test.bats

@@ -2,7 +2,6 @@
 # Comprehensive unit tests for encryption-setup.sh hook
 
 # Add bats library to BATS_LIB_PATH
-export BATS_LIB_PATH="/usr/lib/bats-core"
 
 load 'bats-support/load'
 load 'bats-assert/load'