refactor: complete code efficiency pass (Issues #10, #14, #16)

Backend:
- Add Prisma soft-delete middleware for automatic deletedAt filtering (#10)
- Split 2758-line copilot.service.ts into focused sub-services (#14):
  - copilot-schedule.service.ts (schedule/event tools)
  - copilot-reports.service.ts (reporting/analytics tools)
  - copilot-fleet.service.ts (vehicle/driver tools)
  - copilot-vip.service.ts (VIP management tools)
  - copilot.service.ts now thin orchestrator
- Remove manual deletedAt: null from 50+ queries

Frontend:
- Create SortableHeader component for reusable table sorting (#16)
- Create useListPage hook for shared search/filter/sort state (#16)
- Update VipList, DriverList, EventList to use shared infrastructure

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/src/events/event-status.service.ts

@@ -86,7 +86,6 @@ export class EventStatusService implements OnModuleInit, OnModuleDestroy {
         startTime: { lte: twentyMinutesFromNow, gt: now },
         reminder20MinSent: false,
         driverId: { not: null },
-        deletedAt: null,
       },
       include: {
         driver: true,
@@ -110,7 +109,6 @@ export class EventStatusService implements OnModuleInit, OnModuleDestroy {
         startTime: { lte: fiveMinutesFromNow, gt: now },
         reminder5MinSent: false,
         driverId: { not: null },
-        deletedAt: null,
       },
       include: {
         driver: true,
@@ -218,7 +216,6 @@ Reply:
       where: {
         status: EventStatus.SCHEDULED,
         startTime: { lte: now },
-        deletedAt: null,
       },
       include: {
         driver: true,
@@ -264,7 +261,6 @@ Reply:
       where: {
         status: EventStatus.IN_PROGRESS,
         endTime: { lte: gracePeriodAgo },
-        deletedAt: null,
       },
       include: {
         driver: true,
@@ -347,7 +343,6 @@ Reply with 1, 2, or 3`;
     const driver = await this.prisma.driver.findFirst({
       where: {
         phone: { contains: driverPhone.replace(/\D/g, '').slice(-10) },
-        deletedAt: null,
       },
     });
 
@@ -360,7 +355,6 @@ Reply with 1, 2, or 3`;
       where: {
         driverId: driver.id,
         status: EventStatus.IN_PROGRESS,
-        deletedAt: null,
       },
       include: { vehicle: true },
     });