feat: data models for hosts, monitors, metrics, and alerts

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

fablednetmon/models/metrics.py

@@ -0,0 +1,19 @@
+from __future__ import annotations
+import uuid
+from datetime import datetime, timezone
+from sqlalchemy import DateTime, Float, String
+from sqlalchemy.orm import Mapped, mapped_column
+from .base import Base
+
+
+class PluginMetric(Base):
+    __tablename__ = "plugin_metrics"
+
+    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    source_module: Mapped[str] = mapped_column(String(64), nullable=False)
+    resource_name: Mapped[str] = mapped_column(String(255), nullable=False)
+    metric_name: Mapped[str] = mapped_column(String(128), nullable=False)
+    value: Mapped[float] = mapped_column(Float, nullable=False)
+    recorded_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), nullable=False, default=lambda: datetime.now(timezone.utc)
+    )