add get public and storage feature

app/models/__init__.py

@@ -3,5 +3,13 @@
 from app.models.auth import AuthSession, AuthUser
 from app.models.config import AppConfigEntry
 from app.models.location import Location
+from app.models.public_ip import PublicIPHistory, PublicIPState
 
-__all__ = ["AppConfigEntry", "AuthSession", "AuthUser", "Location"]
+__all__ = [
+    "AppConfigEntry",
+    "AuthSession",
+    "AuthUser",
+    "Location",
+    "PublicIPHistory",
+    "PublicIPState",
+]

app/models/public_ip.py

@@ -0,0 +1,30 @@
+from datetime import datetime
+
+from sqlalchemy import DateTime, Integer, String
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.auth_db import AuthBase
+
+
+class PublicIPState(AuthBase):
+    __tablename__ = "public_ip_state"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
+    current_ipv4: Mapped[str] = mapped_column(String(45), nullable=False)
+    previous_ipv4: Mapped[str | None] = mapped_column(String(45), nullable=True)
+    first_seen_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
+    last_checked_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
+    last_changed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    last_check_status: Mapped[str] = mapped_column(String(32), nullable=False)
+    last_check_error: Mapped[str | None] = mapped_column(String(255), nullable=True)
+    last_provider: Mapped[str | None] = mapped_column(String(64), nullable=True)
+
+
+class PublicIPHistory(AuthBase):
+    __tablename__ = "public_ip_history"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
+    ipv4: Mapped[str] = mapped_column(String(45), nullable=False)
+    observed_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
+    change_type: Mapped[str] = mapped_column(String(32), nullable=False)
+    provider: Mapped[str | None] = mapped_column(String(64), nullable=True)