chore: my-deepagent-seed (BudgetTracker PoC + v0.1.0 seed assets)

Pre-flight assets prepared on the main machine before the new-machine
rewrite of my-deepagent in Python.

- poc/: BudgetTracker + CostMiddleware + MockChatModel PoC.
  Validates wrap_model_call pattern, SQLite WAL + ON CONFLICT upsert,
  per-scope cap accounting. 5/5 pytest PASS in isolated uv venv.
- schemas/: 10 personas (Anthropic Sonnet/Opus/Haiku + DeepSeek mix),
  3 workflows (spec-and-review, bug-fix-with-reproduction,
  code-investigation), 4 artifact JSON Schemas (dev/spec@1,
  dev/phase-plan@1, dev/review-finding-batch@1, common/final-report@1).
- schemas/validate.py: pydantic + Draft202012 cross-validation.
  18/18 assets verified.
- README.md: new-machine bootstrap instructions.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

my-deepagent-seed/schemas/artifacts/dev/review-finding-batch@1.json

@@ -0,0 +1,76 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "dev/review-finding-batch@1",
+  "title": "Dev Review Finding Batch",
+  "description": "코드 리뷰 또는 검증 결과 finding 묶음",
+  "type": "object",
+  "required": ["runId", "phaseKey", "reviewerRole", "findings", "summary"],
+  "additionalProperties": false,
+  "properties": {
+    "runId": {
+      "type": "string",
+      "format": "uuid",
+      "description": "실행 고유 식별자 (UUID)"
+    },
+    "phaseKey": {
+      "type": "string",
+      "minLength": 1,
+      "description": "현재 phase 키 (예: review, verify)"
+    },
+    "reviewerRole": {
+      "type": "string",
+      "minLength": 1,
+      "description": "리뷰어 역할 (예: code-reviewer, verifier, security-auditor)"
+    },
+    "findings": {
+      "type": "array",
+      "items": {
+        "type": "object",
+        "required": ["severity", "category", "summary"],
+        "additionalProperties": false,
+        "properties": {
+          "severity": {
+            "type": "string",
+            "enum": ["info", "low", "medium", "high", "critical"],
+            "description": "심각도"
+          },
+          "category": {
+            "type": "string",
+            "enum": ["correctness", "evidence", "style", "security", "performance", "other"],
+            "description": "finding 카테고리"
+          },
+          "summary": {
+            "type": "string",
+            "minLength": 1,
+            "description": "문제 요약 (보안 finding은 OWASP 카테고리 prefix 권장)"
+          },
+          "filePath": {
+            "type": "string",
+            "description": "해당 파일 경로 (선택)"
+          },
+          "line": {
+            "type": "integer",
+            "minimum": 1,
+            "description": "해당 라인 번호 (선택)"
+          },
+          "evidence": {
+            "type": "string",
+            "description": "증거 코드 또는 설명 (선택)"
+          },
+          "verifierStatus": {
+            "type": "string",
+            "enum": ["unverified", "confirmed", "rejected"],
+            "default": "unverified",
+            "description": "verifier의 검증 상태"
+          }
+        }
+      },
+      "description": "발견된 finding 목록"
+    },
+    "summary": {
+      "type": "string",
+      "minLength": 10,
+      "description": "전체 리뷰 요약"
+    }
+  }
+}