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/security/malicious-packages.txt

@@ -0,0 +1,17 @@
+# Known-bad / denylisted package identifiers. Format: one entry per line, either
+# a bare name (any version) or name@version for a specific pinned bad release.
+# This is a LOCAL denylist used when no live CVE/OSV scanner is available; a real
+# deployment should also run npm audit / pip-audit / osv-scanner (the gate runs
+# them when present and records tool availability in the report).
+#
+# The entries below are illustrative fixtures (documented malware families /
+# typosquat campaigns) so the gate has deterministic denials to test against.
+event-stream@3.3.6
+flatmap-stream
+coa@2.0.3
+rc@1.2.9
+ua-parser-js@0.7.29
+node-ipc@10.1.1
+colors@1.4.44-liberty-2
+crossenv
+cross-env.js