Add Bird model

models/bird.py

@@ -0,0 +1,27 @@
+from sqlalchemy import Column, String, Integer, ForeignKey
+from sqlalchemy.orm import relationship
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.sql import func
+from core.database import Base
+import uuid
+
+class Bird(Base):
+    __tablename__ = "birds"
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    name = Column(String, nullable=False, unique=True, index=True)
+    species = Column(String, nullable=False)
+    description = Column(String)
+    age = Column(Integer)
+    created_at = Column(
+        "created_at", 
+        ForeignKey("created_at_metadata.id"),
+        nullable=False,
+        default=func.now(),
+    )
+    updated_at = Column(
+        "updated_at",
+        ForeignKey("updated_at_metadata.id"),
+        nullable=False,
+        default=func.now(),
+        onupdate=func.now(),
+    )