feat: add Kubernetes manifests and A2A protocol support

Phase 2 - A2A Protocol:
- Add A2A models (AgentCard, Task, Message)
- Add A2A service layer
- Add A2A routes with SSE streaming
- Add agent discovery endpoints

Phase 3 - Kubernetes:
- Add deploy/ directory with Kustomize structure
- PostgreSQL StatefulSet with pgvector
- Redis Deployment with persistence
- API and Orchestrator Deployments
- RBAC for orchestrator to manage Jobs
- ArgoCD Application manifest
- Development and production overlays
- K8s Jobs API support in orchestrator

pyproject.toml

@@ -48,6 +48,9 @@ dependencies = [
     "passlib[bcrypt]",  # Password hashing
     "tenacity",  # Retry logic
     "structlog",  # Structured logging
+
+    # Streaming
+    "sse-starlette",  # Server-Sent Events for A2A streaming
 ]
 
 [project.optional-dependencies]
@@ -138,6 +141,7 @@ select = [
 "roboco/mcp/**/*.py" = ["PLC0415"]
 "roboco/services/*.py" = ["PLC0415"]
 "roboco/api/routes/*.py" = ["PLC0415"]
+"roboco/runtime/*.py" = ["PLC0415"]
 
 # =============================================================================
 # MyPy Configuration
@@ -167,6 +171,7 @@ module = [
     "tiktoken.*",
     "piragi.*",
     "toon.*",
+    "sse_starlette.*",
 ]
 ignore_missing_imports = true