feat: add template version ID to re-emitted boundary logs (#21636)

Adds template_version_id to re-emitted boundary audit logs to allow
filtering and analysis by specific template versions iin addition to the
existing template_id field. Since boundary policies are defined in the
template, the template version is critical to figuring out which policy
was responsible for boundaries decision in a workspace.

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

coderd/workspaceagentsrpc.go

@@ -127,10 +127,11 @@ func (api *API) workspaceAgentRPC(rw http.ResponseWriter, r *http.Request) {
 	defer monitor.close()
 
 	agentAPI := agentapi.New(agentapi.Options{
-		AgentID:        workspaceAgent.ID,
-		OwnerID:        workspace.OwnerID,
-		WorkspaceID:    workspace.ID,
-		OrganizationID: workspace.OrganizationID,
+		AgentID:           workspaceAgent.ID,
+		OwnerID:           workspace.OwnerID,
+		WorkspaceID:       workspace.ID,
+		OrganizationID:    workspace.OrganizationID,
+		TemplateVersionID: build.TemplateVersionID,
 
 		AuthenticatedCtx:                  ctx,
 		Log:                               logger,