feat(fleet): add board observation center with live sources and maps

Add adaptive per-vehicle layouts, full-panel dragging, source controls and automatic preview recovery for RealSense, Insta360 X4 and XGRIDS K1 observation views. Integrate cached Cesium map layers through the private NAS gateway link, retain bounded sensor command receipts, and document validation and operational handoff.

scripts/build_observation_blueprints.py

@@ -0,0 +1,27 @@
+"""Build K1 observation layouts with the repository's pinned Rerun SDK.
+
+These assets contain renderer configuration only, never captured device data.
+Run with .venv/bin/python scripts/build_observation_blueprints.py.
+"""
+from pathlib import Path
+import rerun as rr
+from rerun import blueprint as rrb
+from k1link.viewer.rerun_bridge import _live_time_panel
+
+destination = Path(__file__).resolve().parents[1] / "plugins/xgrids-k1/frontend/src/sensors"
+for mode, position, up in (
+    ("3d", [16.0, -16.0, 18.0], [0.0, 0.0, 1.0]),
+    ("plan", [0.0, 0.0, 30.0], [0.0, 1.0, 0.0]),
+):
+    view = rrb.Spatial3DView(
+        origin="/world", contents=["/world/**"], name="K1 · " + mode,
+        eye_controls=rrb.EyeControls3D.from_fields(
+            kind=rrb.Eye3DKind.Orbital, position=position,
+            look_target=[0.0, 0.0, 0.0], eye_up=up,
+            tracking_entity="/world/sensor_pose",
+        ),
+        time_ranges=[rr.VisibleTimeRange("stream_time", start=rr.TimeRangeBoundary.cursor_relative(seconds=-12), end=rr.TimeRangeBoundary.cursor_relative())],
+    )
+    rrb.Blueprint(view, _live_time_panel(), auto_layout=False, auto_views=False, collapse_panels=True).save(
+        "nodedc_mission_core_spatial", destination / f"observation-{mode}.rbl"
+    )