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/stored-content-scan.sh

@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+set -uo pipefail
+
+# CASAN Plan-16 SEC-26 (X-01) — stored / second-order injection scan.
+#
+# "Trusted" data that later flows INTO a prompt — golden-runs, red-team corpus,
+# traceability map, requirement docs — was never H4-scanned, because the gate only
+# scanned DIRECT input. A payload planted in such a file becomes a stored injection
+# the moment that file is loaded into the model context on a later step (the
+# stored-XSS analog). This scans every such source with the SAME H4 layer
+# (artifact-scan.sh → security-check.sh input mode) BEFORE it may enter a prompt,
+# and BLOCKS on any hit. Fail-closed: a required source that is missing/unreadable,
+# or any scan error, is treated as BLOCK (not silently skipped).
+#
+# Usage: stored-content-scan.sh <path> [<path> ...]
+#   <path> = file or directory (directories scanned recursively; text files only).
+# Exit: 0 all clean · 2 injection detected OR a required source missing/unreadable · 64 usage.
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+ARTIFACT_SCAN="$SCRIPT_DIR/artifact-scan.sh"
+[[ "$#" -ge 1 ]] || { echo "Usage: stored-content-scan.sh <path> [<path> ...]" >&2; exit 64; }
+
+TS="$(date -u +"%Y-%m-%dT%H:%M:%SZ")"
+scanned=0; blocked=0; missing=0
+
+scan_file() {
+  local f="$1"
+  scanned=$((scanned + 1))
+  if ! bash "$ARTIFACT_SCAN" "$f" "stored:$f" >/dev/null 2>&1; then
+    echo "STORED_SCAN_BLOCKED file=$f reason=injection_or_scan_error timestamp=$TS" >&2
+    blocked=$((blocked + 1))
+  fi
+}
+
+for p in "$@"; do
+  if [[ -f "$p" ]]; then
+    scan_file "$p"
+  elif [[ -d "$p" ]]; then
+    # Recurse; scan text files only (grep -I skips binaries), ignore VCS metadata.
+    while IFS= read -r -d '' f; do
+      grep -Iq . "$f" 2>/dev/null && scan_file "$f"
+    done < <(find "$p" -type f -not -path '*/.git/*' -print0 2>/dev/null)
+  else
+    echo "STORED_SCAN_MISSING path=$p (required source absent/unreadable) timestamp=$TS" >&2
+    missing=$((missing + 1))
+  fi
+done
+
+if [[ "$blocked" -gt 0 || "$missing" -gt 0 ]]; then
+  echo "STORED_SCAN_RESULT scanned=$scanned blocked=$blocked missing=$missing verdict=BLOCK timestamp=$TS" >&2
+  exit 2
+fi
+echo "STORED_SCAN_RESULT scanned=$scanned blocked=0 missing=0 verdict=CLEAN timestamp=$TS"
+exit 0