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/test_helper/common.bash

@@ -1,12 +1,10 @@
 #!/usr/bin/env bats
 # Test helper setup for bats-core
 
-# Load bats support libraries if available
-if [[ -f "/usr/lib/bats-core/bats-support/load.bash" ]]; then
-    bats_load_library "/usr/lib/bats-core/bats-support"
-    bats_load_library "/usr/lib/bats-core/bats-assert"
-    bats_load_library "/usr/lib/bats-core/bats-file"
-fi
+# Load bats support libraries
+load 'bats-support/load'
+load 'bats-assert/load'
+load 'bats-file/load'
 
 # Common test variables
 readonly TEST_TEMP_DIR=$(mktemp -d)