feat(agent): add subagent ID fields to devcontainers in manifest by DanielleMaywood · Pull Request #21848 · coder/coder

@DanielleMaywood

Update the agent protobuf schema (agent/proto/agent.proto) to include:
- subagent_id field in WorkspaceAgentDevcontainer message
- id field in CreateSubAgentRequest message

Bump the Agent API version from v2.7 to v2.8 and update all client
references throughout the codebase (ConnectRPC27 -> ConnectRPC28,
DRPCAgentClient27 -> DRPCAgentClient28).

This is a schema-only change with no functional modifications.

DanielleMaywood

DanielleMaywood

johnstcn

@DanielleMaywood

- Add some documentation to agent_drpc_old.go
- Fix version number in agentsdk.go