Refactor/single process multiple services

[renatomaia]

• New service runtime pieces:

  • ServicesSupervisor to manage several services together in a single-process, handle OS signals, propagate stop/reload, and join child errors.
  • TickServiceTemplate for tick-based services:
    • Advancer
    • Claimer
    • EMV Reader
    • PRT
    • Validator
  • HTTPServiceTemplate for HTTP-backed services:
    • JSON-RPC
    • Inspector: now uses the same hardening path and generic HTTP service startup/shutdown behavior.
    • Telemetry: was refactored as a built-in service managed by a Supervisor.

• Error handling and lifecycle behavior were tightened throughout:

  • Use combined errors with errors.Join instead of []error.
  • Shutdown is now driven by context cancellation instead of ad hoc service-stop signaling.
  • Child-service failures are propagated through the supervisor.