refactor(structure): promote app to repo root + remove redundant workspace cruft

Standard production layout: the OKR app (was nested under AINative_OKR_CASAN5/) is now
the repository root. No more wrapper directory.

- Promote AINative_OKR_CASAN5/* -> repo root (backend/ frontend/ packages/ apps/
  .specify/ docs/ infra/ nginx/ scripts/ + configs). Merge tool dirs: .gitea (kept the
  active deploy ci.yml, added harness-ci.yml + runbooks), .claude (agents/commands +
  launch.json), .github moved up.
- Remove redundant: 00_SUBMISSION_PACKAGE, scattered root notes (FPT_CASAN_Full.md,
  tu-tuong-casan.md, casan-tu-sinh..., casan_harness_assessment.md, source-review...,
  README_CASAN5_REFINED.md), casan-next-plans/ and optimize-docs/ (competition/planning
  artifacts — roadmap + design history preserved in git log / commit messages).
- Update all references to the old layout:
  - .gitea/workflows/{ci,harness-ci}.yml, .github/workflows/{ci,deploy}.yml:
    working-directory .; drop AINative_OKR_CASAN5/ prefix; .specify/{tests,scripts}
    -> packages/casan-harness/... (.specify/logs state kept)
  - .claude/launch.json, .gitea/*-runbook.md: path prefixes
  - CLAUDE.md, README.md: docs/input -> apps/okr/domain/input
  - policy-bundle.yaml: 8 policy paths -> packages/casan-harness/...; manifest re-signed
- secrets-scan.sh: fixture excludes -> new package/domain paths.

Full gate from the new root: PASS=64 FAIL=0 SKIP=3.

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

packages/casan-harness/scripts/bash/hallucination-scan.py

@@ -0,0 +1,64 @@
+#!/usr/bin/env python3
+"""CASAN H6 hallucination signal detector.
+
+Reads the quoted keyword markers from hallucination-tracking.yaml plus a set of
+generic uncertainty markers, scans the agent output, and reports how many
+hallucination signals were found. This turns hallucination-tracking.yaml from
+dead config into a real, populated metric written to metrics.jsonl.
+
+Usage: hallucination-scan.py <hallucination-tracking.yaml> <output-file>
+Output (stdout): line 1 = integer signal count, line 2 = JSON list of matches.
+"""
+import json
+import re
+import sys
+
+GENERIC_MARKERS = [
+    "maybe", "might be incorrect", "i am not sure", "uncertain",
+    "i think", "probably", "as far as i know",
+]
+
+
+def load_keywords(path):
+    keywords = []
+    try:
+        with open(path, encoding="utf-8") as fh:
+            for line in fh:
+                # Quoted list items are the hallucination keyword markers
+                # (unquoted list items are structured signal names, not text).
+                m = re.match(r'\s*-\s*"(.+)"\s*$', line)
+                if m:
+                    keywords.append(m.group(1))
+    except OSError:
+        pass
+    return keywords
+
+
+def main():
+    if len(sys.argv) < 3:
+        print(0)
+        print("[]")
+        return
+    keywords = load_keywords(sys.argv[1]) + GENERIC_MARKERS
+    try:
+        with open(sys.argv[2], encoding="utf-8") as fh:
+            text = fh.read().lower()
+    except OSError:
+        print(0)
+        print("[]")
+        return
+    matched = []
+    for kw in keywords:
+        k = kw.lower()
+        if not k:
+            continue
+        count = text.count(k)
+        if count:
+            matched.append({"marker": kw, "count": count})
+    total = sum(m["count"] for m in matched)
+    print(total)
+    print(json.dumps(matched))
+
+
+if __name__ == "__main__":
+    main()