feat: add http, snmp, docker plugins; new widgets and routes for traefik/unifi/ups

- Add HTTP monitor plugin: endpoint checking with status history, latency tracking, time-range views
- Add SNMP plugin: OID polling, device management, metric recording
- Add Docker plugin: container status, resource usage, widget
- Traefik: access log widget, request chart widget, expanded routes
- UniFi: clients widget, devices widget, expanded poll routes
- UPS: history widget, additional routes
- Update plugin index with new entries

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

docker/models.py

@@ -0,0 +1,49 @@
+# plugins/docker/models.py
+from __future__ import annotations
+import uuid
+from datetime import datetime, timezone
+from sqlalchemy import DateTime, Float, Integer, String, Text
+from sqlalchemy.orm import Mapped, mapped_column
+from fabledscryer.models.base import Base
+
+
+class DockerContainer(Base):
+    """Latest known state per container — upserted by name on each scrape."""
+    __tablename__ = "docker_containers"
+
+    # Container name is the stable natural key; container_id changes on recreation
+    name: Mapped[str] = mapped_column(String(255), primary_key=True)
+    container_id: Mapped[str] = mapped_column(String(64), nullable=False, default="")
+    image: Mapped[str] = mapped_column(String(512), nullable=False, default="")
+    status: Mapped[str] = mapped_column(String(32), nullable=False, default="unknown")
+    # running | stopped | paused | exited | dead
+    cpu_pct: Mapped[float | None] = mapped_column(Float, nullable=True)
+    mem_usage_bytes: Mapped[int | None] = mapped_column(Integer, nullable=True)
+    mem_limit_bytes: Mapped[int | None] = mapped_column(Integer, nullable=True)
+    mem_pct: Mapped[float | None] = mapped_column(Float, nullable=True)
+    restart_count: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
+    ports_json: Mapped[str] = mapped_column(Text, nullable=False, default="[]")
+    # JSON: [{"host_port": 8080, "container_port": 80, "protocol": "tcp"}]
+    started_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+    scraped_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), nullable=False,
+        default=lambda: datetime.now(timezone.utc),
+    )
+
+
+class DockerMetric(Base):
+    """Time-series CPU/memory per container — one row per scrape per running container."""
+    __tablename__ = "docker_metrics"
+
+    id: Mapped[str] = mapped_column(
+        String(36), primary_key=True, default=lambda: str(uuid.uuid4())
+    )
+    container_name: Mapped[str] = mapped_column(String(255), nullable=False, index=True)
+    scraped_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), nullable=False,
+        default=lambda: datetime.now(timezone.utc),
+        index=True,
+    )
+    cpu_pct: Mapped[float] = mapped_column(Float, nullable=False, default=0.0)
+    mem_pct: Mapped[float] = mapped_column(Float, nullable=False, default=0.0)
+    mem_usage_bytes: Mapped[int] = mapped_column(Integer, nullable=False, default=0)