```

chore: refactor logging module, update genesis timestamp, remove model relationships, and reorganize routers

- Rename logging.py to logger.py and update import paths in poa.py and main.py
- Update devnet genesis timestamp to 1766828620
- Remove SQLModel Relationship declarations from Block, Transaction, and Receipt models
- Add SessionDep type alias and get_session dependency in coordinator-api deps
- Reorganize coordinator-api routers: replace explorer/registry with exchange, users, marketplace

apps/coordinator-api/src/app/domain/__init__.py

@@ -4,6 +4,7 @@ from .job import Job
 from .miner import Miner
 from .job_receipt import JobReceipt
 from .marketplace import MarketplaceOffer, MarketplaceBid, OfferStatus
+from .user import User, Wallet
 
 __all__ = [
     "Job",
@@ -12,4 +13,6 @@ __all__ = [
     "MarketplaceOffer",
     "MarketplaceBid",
     "OfferStatus",
+    "User",
+    "Wallet",
 ]

apps/coordinator-api/src/app/domain/job.py

@@ -7,7 +7,7 @@ from uuid import uuid4
 from sqlalchemy import Column, JSON
 from sqlmodel import Field, SQLModel
 
-from ..models import JobState
+from ..types import JobState
 
 
 class Job(SQLModel, table=True):

apps/coordinator-api/src/app/domain/user.py

@@ -0,0 +1,88 @@
+"""
+User domain models for AITBC
+"""
+
+from sqlmodel import SQLModel, Field, Relationship, Column
+from sqlalchemy import JSON
+from datetime import datetime
+from typing import Optional, List
+from enum import Enum
+
+
+class UserStatus(str, Enum):
+    ACTIVE = "active"
+    INACTIVE = "inactive"
+    SUSPENDED = "suspended"
+
+
+class User(SQLModel, table=True):
+    """User model"""
+    id: str = Field(primary_key=True)
+    email: str = Field(unique=True, index=True)
+    username: str = Field(unique=True, index=True)
+    status: UserStatus = Field(default=UserStatus.ACTIVE)
+    created_at: datetime = Field(default_factory=datetime.utcnow)
+    updated_at: datetime = Field(default_factory=datetime.utcnow)
+    last_login: Optional[datetime] = None
+    
+    # Relationships
+    wallets: List["Wallet"] = Relationship(back_populates="user")
+    transactions: List["Transaction"] = Relationship(back_populates="user")
+
+
+class Wallet(SQLModel, table=True):
+    """Wallet model for storing user balances"""
+    id: Optional[int] = Field(default=None, primary_key=True)
+    user_id: str = Field(foreign_key="user.id")
+    address: str = Field(unique=True, index=True)
+    balance: float = Field(default=0.0)
+    created_at: datetime = Field(default_factory=datetime.utcnow)
+    updated_at: datetime = Field(default_factory=datetime.utcnow)
+    
+    # Relationships
+    user: User = Relationship(back_populates="wallets")
+    transactions: List["Transaction"] = Relationship(back_populates="wallet")
+
+
+class TransactionType(str, Enum):
+    DEPOSIT = "deposit"
+    WITHDRAWAL = "withdrawal"
+    PURCHASE = "purchase"
+    REWARD = "reward"
+    REFUND = "refund"
+
+
+class TransactionStatus(str, Enum):
+    PENDING = "pending"
+    COMPLETED = "completed"
+    FAILED = "failed"
+    CANCELLED = "cancelled"
+
+
+class Transaction(SQLModel, table=True):
+    """Transaction model"""
+    id: str = Field(primary_key=True)
+    user_id: str = Field(foreign_key="user.id")
+    wallet_id: Optional[int] = Field(foreign_key="wallet.id")
+    type: TransactionType
+    status: TransactionStatus = Field(default=TransactionStatus.PENDING)
+    amount: float
+    fee: float = Field(default=0.0)
+    description: Optional[str] = None
+    tx_metadata: Optional[str] = Field(default=None, sa_column=Column(JSON))
+    created_at: datetime = Field(default_factory=datetime.utcnow)
+    confirmed_at: Optional[datetime] = None
+    
+    # Relationships
+    user: User = Relationship(back_populates="transactions")
+    wallet: Optional[Wallet] = Relationship(back_populates="transactions")
+
+
+class UserSession(SQLModel, table=True):
+    """User session model"""
+    id: Optional[int] = Field(default=None, primary_key=True)
+    user_id: str = Field(foreign_key="user.id")
+    token: str = Field(unique=True, index=True)
+    expires_at: datetime
+    created_at: datetime = Field(default_factory=datetime.utcnow)
+    last_used: datetime = Field(default_factory=datetime.utcnow)