feat(simulator): virtual drone fleet data generator

One process per drone: seeded patrol kinematics, sensor streams at
realistic rates, detection events, hot current/ blocks sealed into
Hive-partitioned Parquet, and the compact UDP state broadcast with
peer RSSI derivation. Scales via docker compose --scale.

simulator/Dockerfile

@@ -0,0 +1,9 @@
+FROM python:3.12-slim
+
+WORKDIR /app
+COPY requirements.txt .
+RUN --mount=type=cache,target=/root/.cache/pip pip install -r requirements.txt
+COPY virtual_drone ./virtual_drone
+
+ENV DATA_DIR=/data
+CMD ["python", "-m", "virtual_drone.main"]