Refactor platform architecture: add persys-scheduler control plane, introduce persys-forgery, and rename core services

[miladhzzzz]

PR Description

Summary

This PR is a major platform refactor that standardizes service naming, replaces the old prow scheduler flow with a new gRPC-based persys-scheduler control plane, introduces the new persys-forgery service, and updates CI/docs/infrastructure wiring accordingly.

What changed

• Renamed core services to persys-* naming:
  • api-gateway → persys-gateway
  • cloud-mgmt → persys-federation
  • prow → persys-scheduler
• Removed obsolete agent submodule and switched to the new compute-agent module reference.
• Added persys-forgery service skeleton and implementation:
  • Build orchestration, handlers, models, queue/secrets/pipeline modules, Dockerfile/Makefile/config/tests.
• Replaced legacy scheduler implementation with new persys-scheduler:
  • New protobuf APIs (control.proto, agent.proto) + generated stubs.
  • gRPC service layer and scheduler core (reconciler, monitor, node/workload/state control).
  • Agent RPC integration path and retry/reconciliation mechanics.
  • Metrics/health endpoints and OpenTelemetry bootstrap.
  • Added scheduler docs and README.
• Added Prometheus instrumentation for scheduler:
  • gRPC request counters/latency.
  • Outbound agent RPC metrics.
  • Reconciliation cycle/result metrics.
  • Node/workload state gauges.
• Added OpenTelemetry tracing updates:
  • Scheduler startup tracer provider wiring.
  • gRPC/HTTP instrumentation.
  • Context propagation through scheduler → agent RPC paths.
• Updated federation service to compile with current module layout:
  • Fixed provider wiring/stubs and service factory.
  • Reworked tracing exporter usage and aligned module dependencies.
  • Replaced stale failing integration suite with compile-safe placeholder test.
• Updated repo-level docs and architecture content:
  • Rewritten top-level README for Persys Compute.
  • Added architecture references and improved onboarding copy.
  • Added docs/PROW_FORGERY_COMMUNICATION.md.
• Updated infra/CI:
  • Docker compose/workflow updates for new service schema.
  • Go workflow and docker image workflow adjustments.

Breaking changes

• Service directories and module paths changed (api-gateway, cloud-mgmt, prow removed/renamed).
• Old scheduler APIs/endpoints are replaced by new persys-scheduler gRPC contracts.
• Any tooling/scripts referencing old folder names must be updated.

Validation performed

• cd persys-scheduler && go test ./...
• cd persys-federation && go test ./...

Notes

• This is a large structural refactor touching service boundaries, module names, and runtime contracts.
• Follow-up PRs can further flesh out federation provider implementations and integration tests.

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