fan-control: presence-aware IPMI fan curve for the R730 PVE host

The iDRAC stock curve runs the CPU at ~72°C on the 7080 RPM floor even
under load (optimises for quiet, not cool). Add a bash daemon + systemd
unit that drives the chassis fans from CPU temp on two curves, picked by
garage occupancy (the server is in the garage): COOL when empty
(measured ~58-65°C under load), QUIET near the silent floor when the
ha-sofia garage door shows someone is there (open, or <15min since last
activity).

Manual fan mode is backstopped: bash EXIT trap + systemd ExecStopPost
hand fans back to Dell auto on stop/crash; CPU>=83°C or repeated IPMI
failures do the same. Pushgateway metrics (job=fan_control). 36 unit
tests cover the pure curve/hysteresis/presence/parse logic; DRY_RUN +
RUN_ONCE for integration checks. Deployed and verified on 192.168.1.127
(CPU 70->58°C in cool mode, hysteresis stepping confirmed).

Design:  docs/plans/2026-06-04-pve-fan-control-design.md
Runbook: docs/runbooks/fan-control.md

[ci skip]

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

stacks/f1-stream/files/backend/extractors/demo.py

@@ -1,75 +0,0 @@
-"""Demo extractor - returns hardcoded test streams for framework testing.
-
-This extractor exists purely for testing the extraction pipeline end-to-end.
-It does NOT connect to any real streaming site. Disable it in production by
-removing its registration from __init__.py or setting DEMO_EXTRACTOR_ENABLED=false.
-"""
-
-import logging
-import os
-
-from backend.extractors.base import BaseExtractor
-from backend.extractors.models import ExtractedStream
-
-logger = logging.getLogger(__name__)
-
-# Set DEMO_EXTRACTOR_ENABLED=false to disable this extractor
-DEMO_ENABLED = os.getenv("DEMO_EXTRACTOR_ENABLED", "true").lower() in ("true", "1", "yes")
-
-
-class DemoExtractor(BaseExtractor):
-    """Demo extractor that returns hardcoded test streams.
-
-    Use this to verify the extraction framework works end-to-end without
-    needing a real streaming site. The streams are publicly available HLS
-    test streams from Apple and others.
-    """
-
-    @property
-    def site_key(self) -> str:
-        return "demo"
-
-    @property
-    def site_name(self) -> str:
-        return "Demo (Test Streams)"
-
-    async def extract(self) -> list[ExtractedStream]:
-        """Return hardcoded test streams for framework testing."""
-        if not DEMO_ENABLED:
-            logger.info("[demo] Demo extractor is disabled via DEMO_EXTRACTOR_ENABLED")
-            return []
-
-        logger.info("[demo] Returning demo test streams")
-
-        streams = [
-            ExtractedStream(
-                url="https://test-streams.mux.dev/x36xhzz/x36xhzz.m3u8",
-                site_key=self.site_key,
-                site_name=self.site_name,
-                quality="720p",
-                title="Big Buck Bunny (Test Stream)",
-                is_live=False,
-            ),
-            ExtractedStream(
-                url="https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_16x9/bipbop_16x9_variant.m3u8",
-                site_key=self.site_key,
-                site_name=self.site_name,
-                quality="1080p",
-                title="Apple Bipbop (Test Stream)",
-                is_live=False,
-            ),
-            ExtractedStream(
-                url="https://demo.unified-streaming.com/k8s/features/stable/video/tears-of-steel/tears-of-steel.ism/.m3u8",
-                site_key=self.site_key,
-                site_name=self.site_name,
-                quality="1080p",
-                title="Tears of Steel (Test Stream)",
-                is_live=False,
-            ),
-        ]
-
-        # Optionally run health checks on the demo streams
-        for stream in streams:
-            stream.is_live = await self.health_check(stream.url)
-
-        return streams