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/tenant-paths.sh

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+# CASAN Plan-16 SEC-23 (MT-01) — tenant-scoped state path resolver. SOURCE this.
+#
+# When CASAN_TENANT_ID is set, exports per-tenant locations for state that would
+# otherwise be global (control-plane settings + its audit chain, telemetry, audit),
+# so each subsystem writes under its own tenant partition. Each var is only set if
+# not already overridden (explicit env wins). An invalid tenant id fails CLOSED.
+#
+# Usage:  source tenant-paths.sh
+# (control-plane-settings.py is tenant-aware on its own via CASAN_TENANT_ID; this
+#  resolver covers the bash subsystems that read path env vars.)
+
+_CASAN_TP_DIR="$(cd "$(dirname "${BASH_SOURCE[0]:-$0}")" && pwd)"
+_CASAN_TS="$_CASAN_TP_DIR/tenant-store.sh"
+
+_casan_tp_set() {  # <var-name> <logical-name>
+  local var="$1" name="$2" path
+  [[ -n "${!var:-}" ]] && return 0            # explicit override wins
+  path="$(bash "$_CASAN_TS" resolve "$name" 2>/dev/null)" || return 1
+  export "$var=$path"
+}
+
+if [[ -n "${CASAN_TENANT_ID:-}" ]]; then
+  if ! bash "$_CASAN_TS" id >/dev/null 2>&1; then
+    echo "TENANT_PATHS_DENIED invalid or missing tenant id" >&2
+    return 1 2>/dev/null || exit 1
+  fi
+  _casan_tp_set CASAN_CP_STORE_FILE     control-plane/settings.json
+  _casan_tp_set CASAN_CP_KEY_DIR        control-plane/keys
+  _casan_tp_set CASAN_METRICS_DIR       telemetry/cost
+  _casan_tp_set CASAN_TENANT_AUDIT_DIR  audit
+fi