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.

services/pcp-tgu-ops-ui/src/model/timelineTypes.ts

@@ -31,6 +31,7 @@ export type TimelineRow = {
 export type TimelinePlanSegment = {
   plan: TguPlanUi;
   rowIndex: number;
+  laneOffset: number;
   x: number;
   x2: number;
   width: number;