fix: harden task3 qdrant compatibility boundaries

backend/test/workspace-runtime-renderer.test.ts

@@ -1,4 +1,3 @@
-import { execFileSync } from "node:child_process";
 import { mkdtempSync, rmSync, writeFileSync } from "node:fs";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
@@ -109,7 +108,7 @@ test("keeps create_if_missing for non-registry runtime renders", () => {
 });
 
 test.each(["session", "maintenance"])(
-  "renders require_existing vectors for %s acquisition",
+  "pure renderer emits require_existing vectors for %s acquisition",
   (mode) => {
     const rendered = parse(renderRuntimeConfig(workspaceV3, directBindings, paths, {
       workspaceId: "psd-clinical", workspaceRevision: "a".repeat(40),
@@ -124,36 +123,12 @@ test.each(["session", "maintenance"])(
   },
 );
 
-test("session and maintenance renders are byte-identical and bind identically in harness", () => {
+test("pure session and maintenance renders are byte-identical", () => {
   const context = { workspaceId: "psd-clinical", workspaceRevision: "a".repeat(40) };
-  const passwordFile = evidenceSecretFile("dwh-password", "not-a-canary");
-  const bindings = {
-    ...directBindings,
-    dwh: { ...directBindings.dwh, values: {
-      ...directBindings.dwh.values,
-      THT_WS_PSD_CLINICAL_DWH_PASSWORD_FILE: passwordFile,
-    } },
-  };
-  const session = renderRuntimeConfig(workspaceV3, bindings, paths, context, {}, semanticRuntime);
-  const maintenance = renderRuntimeConfig(workspaceV3, bindings, paths, context, {}, semanticRuntime);
+  const session = renderRuntimeConfig(workspaceV3, directBindings, paths, context, {}, semanticRuntime);
+  const maintenance = renderRuntimeConfig(workspaceV3, directBindings, paths, context, {}, semanticRuntime);
 
   expect(maintenance).toBe(session);
-
-  const script = `
-import json, sys, tempfile
-from pathlib import Path
-from tht.config import load_config
-from tht.jobs.dwh_pipeline import config_dwh_binding
-with tempfile.TemporaryDirectory() as root:
-    path = Path(root) / "runtime.yaml"
-    path.write_text(sys.stdin.read())
-    print(json.dumps(config_dwh_binding(load_config(path)), sort_keys=True))
-`;
-  const python = join(process.cwd(), "../harness/.venv/bin/python");
-  const run = (yaml: string) => execFileSync(python, ["-c", script], {
-    cwd: join(process.cwd(), "../harness"), input: yaml, encoding: "utf8",
-  }).trim();
-  expect(run(session)).toBe(run(maintenance));
 });
 
 test("renders schema-v3 DWH REST without exposing secret contents", () => {