feat(plan-01): Phase 1 — relocate harness code to packages/casan-harness (symlink facade)

Physically move the pure-code subtrees out of .specify into the package, leaving
compat symlinks at the old .specify/<dir> paths so every existing reference (internal
CASAN_HARNESS_ROOT + external CI/docker/mjs) keeps resolving. Runtime state stays put.

Moved (git mv): scripts/ tests/ security/ templates/ config/ governance/ memory/
  .specify/<dir>  ->  packages/casan-harness/<dir>   (+ .specify/<dir> symlink)
Stays in .specify (state/governance/domain, handled later): logs/ agentops/ level5/
  init-options.json traceability-map.json

Python `.resolve()` self-location followed the compat symlink into packages and lost
the app root; generate-casan-demo-context.py, generate-agentops-dashboard.py and
dashboard-server.py now walk UP for the `.specify` state marker instead of a fixed
parent depth (fixes "missing trace files" in run-casan4).

Full gate: PASS=64 FAIL=0 SKIP=3 (CASAN_CI_STEP_TIMEOUT_SEC=1200 — track-a ~450s runs
close to the 600s default and can tip over under load; this is timing variance, not a
regression — it passed cleanly with headroom). Runtime log/audit artifacts kept unstaged.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

AINative_OKR_CASAN5/packages/casan-harness/scripts/bash/verify-harness-reuse.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Verify CASAN Level 5 shared harness reuse across more than one project.
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+source "$SCRIPT_DIR/casan-paths.sh"
+PROJECT_ROOT="$(cd "$SCRIPT_DIR/../../.." && pwd)"
+REGISTRY="$CASAN_HARNESS_ROOT/level5/project-registry.json"
+PACKAGE="$CASAN_HARNESS_ROOT/level5/harness-package.json"
+
+python - "$REGISTRY" "$PACKAGE" <<'PY'
+import json
+import sys
+registry = json.load(open(sys.argv[1], encoding="utf-8"))
+package = json.load(open(sys.argv[2], encoding="utf-8"))
+name = package["package"]
+version = package["version"]
+projects = [
+    p for p in registry["projects"]
+    if p.get("harness_package") == name and p.get("harness_version") == version
+]
+if len(projects) < 2:
+    raise SystemExit(f"HARNESS_REUSE_INSUFFICIENT package={name} version={version} count={len(projects)}")
+print(f"HARNESS_REUSE_VALID package={name} version={version} project_count={len(projects)}")
+PY