Flatten to a single package directory

The checkout is now astrape/astrape-dashboard, not astrape/astrape-dashboard/<package>. The package
contents move to the repository root and pyproject maps the package name to
'.' via package-dir, with the subpackages listed explicitly.

The systemd units move out to /srv/astrape/deploy/systemd, outside every
repository, because they describe this deployment rather than any one
component.

Verified both install modes: editable, which is how the deployment runs, and
a plain wheel install, which is what the container build does.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

scripts/debug/debug_weather.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+"""Debug script to trace resolved truth data."""
+
+from astrape_ems.classes.env import EnvLoader
+from astrape_oracle.classes.weather.store import WeatherStore
+from astrape_dashboard.classes.displays.weather import WeatherDisplay
+from datetime import datetime, timezone
+
+EnvLoader().load()
+
+store = WeatherStore.from_env()
+dataset = store.load_display_dataset()
+
+print(f"\n=== DEBUG OUTPUT ===")
+print(f"Forecast points: {len(dataset.forecast_points)}")
+print(f"Resolved truth points: {len(dataset.resolved_truth)}")
+
+print(f"\nResolved truth details:")
+for i, point in enumerate(dataset.resolved_truth):
+    print(f"  [{i}] resolved_at={point.resolved_at}, temp={point.temperature_c}, radiation={point.shortwave_radiation_w_m2}")
+
+print(f"\nAPI payload:")
+display = WeatherDisplay()
+payload = display.data_payload(dataset)
+import json
+data = json.loads(payload)
+print(f"  Resolved truth in payload: {len(data['resolved_truth'])}")
+for i, point in enumerate(data['resolved_truth']):
+    print(f"  [{i}] resolved_at={point['resolved_at']}, temp={point['temperature_c']}")
+
+print(f"\n=== END DEBUG ===\n")