refactor: make workspace descriptors schema v3 only

backend/src/workspaces/runtime-renderer.ts

@@ -4,9 +4,9 @@ import { buildInstallationContract } from "./contracts.js";
 import {
   validateWorkspaceDescriptor,
   type WorkspaceDescriptor,
-  type WorkspaceV2,
   type WorkspaceV3,
 } from "./schema.js";
+import type { DeprecatedV2Descriptor } from "./deprecated-v2-descriptor.js";
 import type { ResolvedBinding, ResolvedEvidenceBinding, RuntimeBindings } from "./bindings.js";
 export type { RuntimeBindings } from "./bindings.js";
 
@@ -216,8 +216,8 @@ export function renderRuntimeConfig(
     if (!variable) throw new Error(`workspace contract is missing ${role}_${suffix}`);
     return variable.name;
   };
-  if (descriptor.workspace.schema_version !== 2) {
-    if (descriptor.workspace.schema_version === 1) {
+  if (Number(descriptor.workspace.schema_version) !== 2) {
+    if (Number(descriptor.workspace.schema_version) === 1) {
       throw new Error("Workspace descriptor requires explicit migration to schema version 2");
     }
     const canonicalV3 = descriptor as WorkspaceV3;
@@ -290,7 +290,7 @@ export function renderRuntimeConfig(
     return stringify(renderedV3, { lineWidth: 0, sortMapEntries: false });
   }
 
-  const canonical = descriptor as WorkspaceV2;
+  const canonical = descriptor as unknown as DeprecatedV2Descriptor;
   if ([...bindings.dwh.missing, ...bindings.vector.missing, ...bindings.embedding.missing].length > 0) {
     throw new Error("runtime configuration requires complete bindings");
   }