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/agentops/metrics.yaml

@@ -0,0 +1,52 @@
+version: 1.0
+description: CASAN H6 AgentOps metrics and scoring configuration
+
+collection:
+  enabled: true
+  trace_format: json
+  metrics_format: jsonl
+  trace_dir: ".specify/logs/trace"
+  metrics_log: ".specify/logs/cost/metrics.jsonl"
+  alert_log: ".specify/agentops/alerts.log"
+
+dimensions:
+  - trace_id
+  - timestamp
+  - agent
+  - step
+  - status
+  - exit_code
+  - latency_ms
+  - retry_count
+  - input_tokens
+  - output_tokens
+  - total_tokens
+  - cost_estimate
+  - alerts
+  - input_hash
+  - output_hash
+
+cost_model:
+  default_cost_per_1k_tokens_usd: 0.002
+  override_env: CASAN_COST_PER_1K
+
+thresholds:
+  latency_alert_ms: 5000
+  retry_alert_threshold: 2
+  token_alert_threshold: 5000
+  failure_alert: true
+
+level4_gate:
+  required: true
+  minimum_evidence:
+    traces_per_pipeline_step: 1
+    metrics_log_present: true
+    alert_rules_present: true
+    failure_status_recorded: true
+
+level5_readiness:
+  required_additions:
+    - drift_detection_against_golden_runs
+    - model_fallback_routing
+    - live_dashboard
+    - business_outcome_metrics