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/config/loop-policy.schema.json

@@ -0,0 +1,59 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "$id": "https://casan.fpt/loop-policy.schema.json",
+  "title": "CASAN Loop Budget Governor policy",
+  "description": "Schema for packages/casan-harness/config/loop-policy.yaml (Plan-17 Track 1). Budgets are non-negative numbers; on_exceed is halt|escalate. Absence of a rule means the strictest built-in ceiling applies (deny-by-default).",
+  "type": "object",
+  "required": ["version", "profiles"],
+  "additionalProperties": false,
+  "properties": {
+    "version": { "type": "integer", "minimum": 1 },
+    "org_ceiling": { "$ref": "#/definitions/budget" },
+    "profiles": {
+      "type": "object",
+      "minProperties": 1,
+      "additionalProperties": { "$ref": "#/definitions/profileBlock" }
+    }
+  },
+  "definitions": {
+    "budget": {
+      "type": "object",
+      "additionalProperties": false,
+      "properties": {
+        "max_steps": { "type": "number", "minimum": 0 },
+        "max_tokens": { "type": "number", "minimum": 0 },
+        "max_wall_clock_sec": { "type": "number", "minimum": 0 },
+        "max_cost_usd": { "type": "number", "minimum": 0 },
+        "max_corrections_per_step": { "type": "number", "minimum": 0 },
+        "on_exceed": { "type": "string", "enum": ["halt", "escalate"] }
+      }
+    },
+    "convergence": {
+      "type": "object",
+      "additionalProperties": false,
+      "properties": {
+        "oscillation_repeat": { "type": "integer", "minimum": 1 },
+        "thrash_window": { "type": "integer", "minimum": 1 },
+        "no_progress_window": { "type": "integer", "minimum": 1 },
+        "on_stall": { "type": "string", "enum": ["halt", "escalate"] }
+      }
+    },
+    "profileBlock": {
+      "type": "object",
+      "additionalProperties": false,
+      "properties": {
+        "defaults": { "$ref": "#/definitions/budget" },
+        "delegation_levels": {
+          "type": "object",
+          "propertyNames": { "pattern": "^L[0-5]$" },
+          "additionalProperties": { "$ref": "#/definitions/budget" }
+        },
+        "projects": {
+          "type": "object",
+          "additionalProperties": { "$ref": "#/definitions/budget" }
+        },
+        "convergence": { "$ref": "#/definitions/convergence" }
+      }
+    }
+  }
+}