fix: accept remoteA2aAgent in GenericResourceOverwrite

[PopescuTudor]

Summary

Adds remoteA2aAgent to the accepted resource_type tags of GenericResourceOverwrite. Unblocks agents that reference Remote A2A resources — they currently fail to start in Alpha with a Pydantic union_tag_invalid error.

Root cause

Solutions containing Remote A2A resources emit runtime overwrites keyed by remoteA2aAgent.<name>[.<folder>] (see AgentHubService Kind.RemoteA2aAgent → serialized as camelCase remoteA2aAgent). At agent startup the runtime deserializes the overwrite map via ResourceOverwriteParser.parse, which validates each entry against the discriminated union ResourceOverwriteUnion.

The parser extracts remoteA2aAgent as the discriminator but the GenericResourceOverwrite.resource_type Literal only listed process | index | app | asset | bucket | mcpServer | queue. Pydantic rejects the tag → the whole overwrite batch fails → agent never starts.

Observed error (from Alpha job logs):

1 validation error for tagged-union[GenericResourceOverwrite, ..., EntityResourceOverwrite, ConnectionResourceOverwrite]
  Input tag 'remoteA2aAgent' found using 'resource_type' does not match any of the expected tags:
  'process', 'index', 'app', 'asset', 'bucket', 'mcpServer', 'queue', 'entity', 'connection'
  [type=union_tag_invalid, input_value={'resource_type': 'remote...', 'name': 'basica2a'}, input_type=dict]

Fix

Extend the Literal with "remoteA2aAgent". Remote A2A overwrites have the same name + folderPath shape as other generic resources, so no dedicated subclass is needed.

Bumps uipath-platform to 0.1.33.

What was missing from the original rollout

Remote A2A support was added across the stack — AgentA2aResourceConfig (agent.json authoring), a2a_tool.py in uipath-langchain-python, the langgraph wiring in uipath-agents-python, and the CRUD + proxy endpoints in AgentHubService. This overwrite binding was the one gap: the parser is the gate every agent runtime passes through at startup, regardless of whether the A2A code itself uses the override today.

Test plan

• New test class TestRemoteA2aAgentResourceOverwrite covers:
  • Direct GenericResourceOverwrite(resource_type="remoteA2aAgent", ...) construction
  • ResourceOverwriteParser.parse(key="remoteA2aAgent.basica2a.solution_folder", ...) roundtrip
• Full uipath test suite: 1786 passed, 0 failures
• End-to-end validation in Alpha: deploy a solution containing a low-code agent with an A2A resource, start a job, confirm no union_tag_invalid error

Links

Observed in Alpha against low-code agent 2d2417eb-881b-4828-9018-f9eb7683c5dc with an A2A resource basica2a (external a2a-test-agent-192161339979.us-central1.run.app).