feat(plan-01): Phase 4a — make harness location-independent (facade-free capable)

Resolve every root by marker walk-up instead of a fixed depth that only lands on the
app via the .specify compat symlink, so the harness runs correctly when invoked by its
real packages/casan-harness path — proven by a full gate run via that path: 64/0/0.

- 95 scripts/tests: PROJECT_ROOT/ROOT "$SCRIPT_DIR/../.."-style computations -> $CASAN_APP_ROOT.
- 6 leaf scripts (infra-lab, context-validate, secrets-scan, path-guard, toolchain-verify,
  phase2-sourcegen) now source casan-paths + use CASAN_APP_ROOT.
- run-casan4: source casan-paths as a package sibling (facade-independent), PROJECT_ROOT=CASAN_APP_ROOT.
- 8 Python files: project_root()/REPO_ROOT/bundle_root walk UP for the .specify marker
  (control-plane-settings, loop_common, model-call, context-compress, test-integrity,
  bundle-integrity, traceability-matrix; generate-* fixed earlier).
- evidence-pack-build.py + traceability-matrix.py: domain refs -> apps/okr/domain
  (input/, corpus/redteam-vectors.jsonl, traceability-map.json).
- ci-harness-gate.sh: export CASAN_TESTS_DIR/CASAN_TEST_MANIFEST/CASAN_BUNDLE_ROOT so the
  integrity Python resolves via the harness root regardless of invocation path; ROOT=CASAN_APP_ROOT.
- Remove the domain compat symlinks from packages/casan-harness/security (redteam-corpus,
  redteam-vectors, benign-corpus) — packages now holds NO domain data.

Both invocation paths pass (compat facade still present): .specify/... and packages/...

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

AINative_OKR_CASAN5/packages/casan-harness/scripts/bash/model-call.py

@@ -23,6 +23,19 @@ Usage:
 import argparse
 import json
 import os
+
+
+def _casan_app_root():
+    # Plan-01: walk UP for the `.specify` state marker (harness code lives in
+    # packages/casan-harness/, so a fixed __file__ depth would mis-root).
+    _d = os.path.abspath(os.path.dirname(__file__))
+    _p = _d
+    while _p != os.path.dirname(_p):
+        if os.path.isdir(os.path.join(_p, ".specify")):
+            return _p
+        _p = os.path.dirname(_p)
+    return os.path.abspath(os.path.join(_d, "..", "..", ".."))
+
 import subprocess
 import sys
 import time
@@ -31,7 +44,7 @@ from datetime import datetime, timezone
 
 OLLAMA_HOST = "127.0.0.1:11434"          # the only allowed ollama endpoint
 ALLOWED_CLOUD = {"api.anthropic.com", "api.openai.com"}
-REPO_ROOT = os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "..", ".."))
+REPO_ROOT = _casan_app_root()
 PROVIDER_LOG = os.path.join(REPO_ROOT, ".specify/logs/level5/provider-usage.jsonl")
 
 # SEC-21 (ARCH-07): a 180s-per-call timeout across many pipeline steps let a hung