[AZ-219] Scaffold onboard runtime project

Add the initial source, test, infrastructure, CI, configuration, and evidence-path scaffold so dependent implementation tasks have stable package and runtime boundaries.

Co-authored-by: Cursor <cursoragent@cursor.com>

.env.example

@@ -0,0 +1,10 @@
+GPSD_ENV=development
+GPSD_CONFIG_DIR=./config/development
+GPSD_CACHE_DIR=./data/cache
+GPSD_FDR_DIR=./data/fdr
+GPSD_DATABASE_URL=postgresql://gpsd:gpsd@localhost:5432/gpsd
+GPSD_MAVLINK_URL=udp:127.0.0.1:14550
+GPSD_CAMERA_SOURCE=./data/input
+GPSD_SIGNING_KEY_REF=test-key-ref
+GPSD_MAX_FDR_BYTES=104857600
+GPSD_LOG_LEVEL=info