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

uv.lock

@@ -850,7 +850,7 @@ wheels = [
 
 [[package]]
 name = "fastapi"
-version = "0.127.1"
+version = "0.128.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "annotated-doc" },
@@ -858,9 +858,9 @@ dependencies = [
     { name = "starlette" },
     { name = "typing-extensions" },
 ]
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+sdist = { url = "https://files.pythonhosted.org/packages/52/08/8c8508db6c7b9aae8f7175046af41baad690771c9bcde676419965e338c7/fastapi-0.128.0.tar.gz", hash = "sha256:1cc179e1cef10a6be60ffe429f79b829dce99d8de32d7acb7e6c8dfdf7f2645a", size = 365682, upload-time = "2025-12-27T15:21:13.714Z" }
 wheels = [
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+    { url = "https://files.pythonhosted.org/packages/5c/05/5cbb59154b093548acd0f4c7c474a118eda06da25aa75c616b72d8fcd92a/fastapi-0.128.0-py3-none-any.whl", hash = "sha256:aebd93f9716ee3b4f4fcfe13ffb7cf308d99c9f3ab5622d8877441072561582d", size = 103094, upload-time = "2025-12-27T15:21:12.154Z" },
 ]
 
 [[package]]
@@ -2447,15 +2447,15 @@ wheels = [
 
 [[package]]
 name = "pdfminer-six"
-version = "20251107"
+version = "20251227"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "charset-normalizer" },
     { name = "cryptography" },
 ]
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+sdist = { url = "https://files.pythonhosted.org/packages/fb/ef/543d0d44c9b03ac08316d31afd8e52b8ab8a86d03620ee0d61d6006bba9c/pdfminer_six-20251227.tar.gz", hash = "sha256:1d98781cf884d7274c694e742a94ffe6326ee11ee7ea79e73e1e75c4c74d91eb", size = 7388054, upload-time = "2025-12-27T20:16:22.969Z" }
 wheels = [
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+    { url = "https://files.pythonhosted.org/packages/ea/d3/90bc3ec25e5f33e8e1dea5fd67eae0ef2e8666e7721156fb0091c7098a42/pdfminer_six-20251227-py3-none-any.whl", hash = "sha256:7a41f668a74fdde9e3a6c9265e400992a8312224fb6dbc13ee8861111e330d36", size = 5620874, upload-time = "2025-12-27T20:16:21.09Z" },
 ]
 
 [[package]]
@@ -3300,6 +3300,7 @@ dependencies = [
     { name = "python-toon" },
     { name = "redis" },
     { name = "sqlalchemy", extra = ["asyncio"] },
+    { name = "sse-starlette" },
     { name = "structlog" },
     { name = "tenacity" },
     { name = "tiktoken" },
@@ -3383,6 +3384,7 @@ requires-dist = [
     { name = "safety", marker = "extra == 'dev'" },
     { name = "semgrep", marker = "extra == 'dev'" },
     { name = "sqlalchemy", extras = ["asyncio"] },
+    { name = "sse-starlette" },
     { name = "structlog" },
     { name = "tenacity" },
     { name = "tiktoken" },