Add PCP architecture docs and TGU ops updates

Capture current PCP architecture notes, service-map prototypes, TGU operations UI/map work, local configuration updates, database helper scripts, and request/sample JSON artifacts.

create_pcp_databases.sh

@@ -0,0 +1,86 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# PostgreSQL connection settings. Override via env if needed:
+#   PGHOST=... PGPORT=... PGUSER=... PGPASSWORD=... ./create_pcp_databases.sh
+PGHOST="${PGHOST:-192.168.1.8}"
+PGPORT="${PGPORT:-5432}"
+PGUSER="${PGUSER:-postgres}"
+PGPASSWORD="${PGPASSWORD:-password}"
+export PGPASSWORD
+
+DATABASES=(
+  pcp_ballistics
+  pcp_complex_plan
+  pcp_missions
+  pcp_requests
+  pcp_satellite_catalog
+  pcp_satellites
+  pcp_slots
+  pcp_stations
+  pcp_tgu
+  pcp_tle
+)
+
+# Services whose migrations use PostGIS geometry/extension.
+POSTGIS_DATABASES=(
+  pcp_ballistics
+  pcp_missions
+  pcp_requests
+  pcp_slots
+  pcp_stations
+)
+
+psql_admin() {
+  psql -v ON_ERROR_STOP=1 \
+    --host="$PGHOST" \
+    --port="$PGPORT" \
+    --username="$PGUSER" \
+    --dbname=postgres \
+    "$@"
+}
+
+psql_db() {
+  local db="$1"
+  shift
+  psql -v ON_ERROR_STOP=1 \
+    --host="$PGHOST" \
+    --port="$PGPORT" \
+    --username="$PGUSER" \
+    --dbname="$db" \
+    "$@"
+}
+
+create_database_if_missing() {
+  local db="$1"
+  local exists
+  exists="$(psql_admin -tAc "SELECT 1 FROM pg_database WHERE datname = '$db'")"
+  if [[ "$exists" == "1" ]]; then
+    echo "Database already exists: $db"
+  else
+    echo "Creating database: $db"
+    psql_admin -c "CREATE DATABASE \"$db\" OWNER \"$PGUSER\" ENCODING 'UTF8';"
+  fi
+}
+
+enable_postgis_if_possible() {
+  local db="$1"
+  echo "Enabling PostGIS in database: $db"
+  psql_db "$db" -c "CREATE EXTENSION IF NOT EXISTS postgis;"
+}
+
+main() {
+  echo "Target PostgreSQL: ${PGHOST}:${PGPORT}, user=${PGUSER}"
+
+  for db in "${DATABASES[@]}"; do
+    create_database_if_missing "$db"
+  done
+
+  for db in "${POSTGIS_DATABASES[@]}"; do
+    enable_postgis_if_possible "$db"
+  done
+
+  echo "Done. Databases are ready. Services will create their schemas via Flyway on startup."
+}
+
+main "$@"