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/provider-cost-lookup.py

@@ -0,0 +1,29 @@
+#!/usr/bin/env python3
+"""Return '<total_tokens> <cost_usd>' for the provider-telemetry record that
+matches the given step, or print nothing if there is no genuine match.
+
+Never falls back to an arbitrary record — reusing one sample's cost across
+every step would misrepresent an estimate as real per-step billing.
+
+Usage: provider-cost-lookup.py <provider-usage.jsonl> <step-name>
+"""
+import json
+import sys
+
+if len(sys.argv) < 3:
+    sys.exit(0)
+path, step = sys.argv[1], sys.argv[2]
+match = None
+try:
+    with open(path, encoding="utf-8") as fh:
+        for line in fh:
+            line = line.strip()
+            if not line:
+                continue
+            rec = json.loads(line)
+            if rec.get("step") == step:
+                match = rec  # last matching record wins
+except OSError:
+    sys.exit(0)
+if match is not None:
+    print(f"{match.get('total_tokens', 0)} {match.get('cost_usd', 0)}")