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/import-provider-telemetry.sh

@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# CASAN Level 5 provider usage telemetry importer.
+# Usage:
+#   import-provider-telemetry.sh <provider-usage-json>
+
+INPUT_JSON="${1:-}"
+if [[ -z "$INPUT_JSON" || ! -f "$INPUT_JSON" ]]; then
+  echo "Usage: import-provider-telemetry.sh <provider-usage-json>" >&2
+  exit 64
+fi
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+source "$SCRIPT_DIR/casan-paths.sh"
+PROJECT_ROOT="$CASAN_APP_ROOT"
+LOG_DIR="$CASAN_STATE_ROOT/logs/level5"
+OUT="$LOG_DIR/provider-usage.jsonl"
+mkdir -p "$LOG_DIR"
+
+python - "$INPUT_JSON" "$OUT" <<'PY'
+import json
+import sys
+from datetime import datetime, timezone
+
+src, out = sys.argv[1], sys.argv[2]
+data = json.load(open(src, encoding="utf-8"))
+required = ["provider", "model", "run_id", "step", "input_tokens", "output_tokens", "total_tokens", "cost_usd", "latency_ms", "status"]
+missing = [key for key in required if key not in data]
+if missing:
+    raise SystemExit(f"PROVIDER_USAGE_INVALID missing={missing}")
+record = {
+    "timestamp": datetime.now(timezone.utc).strftime("%Y-%m-%dT%H:%M:%SZ"),
+    "harness": "L5-provider-telemetry",
+    **data,
+}
+with open(out, "a", encoding="utf-8") as f:
+    f.write(json.dumps(record) + "\n")
+print(f"PROVIDER_TELEMETRY_IMPORTED provider={data['provider']} model={data['model']} total_tokens={data['total_tokens']} cost_usd={data['cost_usd']} output={out}")
+PY