feat(cli): add task budget increase command (BRIX-1929)

[quay-worker]

Summary

• Add quay task increase-budget <task_id> (--by <n>|--set <n>) --reason <text> [--force].
• Recompute budget_exhausted after raising retry_budget and record a task_budget_adjusted audit event with the operator reason.
• Guard terminal/live states and document the operator recovery workflow in CLI help, troubleshooting, and spec docs.

Deployment Steps

✅ No manual deployment steps needed, will be fully operational after automated CI deployment.

Test Plan

Pre-merge checklist

• bun test packages/cli/tests/task/task_budget.test.ts
• bun run typecheck:cli
• bun run test:cli

Post-deployment verification

• Confirm quay task increase-budget <task_id> --by 1 --reason "operator recovery" raises budget and writes a task_budget_adjusted event in a deployed operator environment.

[linear]

BRIX-1929

[quay-reviewer]

lgtm!