Add Orders response examples

[roncodes]

Summary

• Adds 2xx response examples for every Fleetbase API Orders endpoint.
• Fills previously empty Orders example response bodies, including proof capture, activity, schedule, cancel, and create variants.
• Cross-checks response shapes against FleetOps OrderController return paths and resources: OrderResource, ProofResource, DeletedResource, tracker ETA/distance JSON, comments, and editable entity fields.

Verification

• pnpm postman:lint
• node scripts/validate-collections.js
• POSTMAN_COLLECTIONS_DIR=/Users/ron/Development/fleetbase/postman/postman/collections pnpm generate:api-docs