feat(agent-office): scaffold backend — config, db, models, Dockerfile

SQLite DB layer with WAL mode, agent_config/tasks/logs/telegram_state tables,
2 seeded agents, full CRUD, and passing test suite (7/7).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

agent-office/app/models.py

@@ -0,0 +1,35 @@
+from pydantic import BaseModel
+from typing import Optional
+
+
+class CommandRequest(BaseModel):
+    agent: str
+    action: str
+    params: Optional[dict] = None
+
+
+class ApprovalRequest(BaseModel):
+    agent: str
+    task_id: str
+    approved: bool
+    feedback: Optional[str] = None
+
+
+class AgentConfigUpdate(BaseModel):
+    enabled: Optional[bool] = None
+    schedule_config: Optional[dict] = None
+    custom_config: Optional[dict] = None
+
+
+class PriceAlertConfig(BaseModel):
+    symbol: str
+    name: str
+    target_price: float
+    direction: str  # "above" or "below"
+
+
+class ComposeCommand(BaseModel):
+    prompt: str
+    style: Optional[str] = None
+    model: Optional[str] = "V4"
+    instrumental: Optional[bool] = False