feat: select the TechLog Studio adapter from runtime configuration

Adds TECH_LOG_STUDIO_SOURCE (MOCK | HTTP, default MOCK) to the V2 runtime
config schema so a build can switch createTechLogFeatureInstalledInput
between the mock and HTTP Studio gateways without a rebuild. V1 documents
predate the key and always normalize to MOCK. The HTTP gateway is
constructed with only { operations } per Task 4's actual signature -
no CSRF provider is wired here; that lands with attachCredentials at a
later composition-root task.

Updates every existing Studio test call site to the new required
createTechLogFeatureInstalledInput(context) signature via a shared
tests/helpers/studio-install-context.ts MOCK fixture, so the whole
existing Studio suite keeps exercising the mock adapter unchanged.

tests/features/tech-log/studio-screens-smoke.test.tsx

@@ -7,6 +7,7 @@ import { MemoryRouter, useLocation, useNavigate } from "react-router-dom";
 import { afterEach, describe, expect, it, vi } from "vitest";
 
 import { createTechLogFeatureInstalledInput } from "../../../src/features/tech-log/adapters/create-tech-log-feature-input.ts";
+import { MOCK_STUDIO_INSTALL_CONTEXT } from "../../helpers/studio-install-context.ts";
 import type { StudioGateway } from "../../../src/features/tech-log/application/ports/studio-gateway.ts";
 import type { DocumentPage } from "../../../src/features/tech-log/contracts/studio/contract.ts";
 import { DocumentList } from "../../../src/features/tech-log/presentation/studio/components/document-list.tsx";
@@ -40,7 +41,7 @@ function RouterStudioProvider({
 }
 
 function renderScreen(children: ReactNode, gateway: StudioGateway) {
-  const input = createTechLogFeatureInstalledInput().input;
+  const input = createTechLogFeatureInstalledInput(MOCK_STUDIO_INSTALL_CONTEXT).input;
   return render(
     <ApplicationProvider
       application={createTestApplication({
@@ -56,7 +57,7 @@ function renderScreen(children: ReactNode, gateway: StudioGateway) {
 
 describe("TechLog Studio index screens", () => {
   it("shows the source dashboard totals, workflow sections, status links, and sample rows", async () => {
-    const gateway = createTechLogFeatureInstalledInput().input.createStudioGateway();
+    const gateway = createTechLogFeatureInstalledInput(MOCK_STUDIO_INSTALL_CONTEXT).input.createStudioGateway();
 
     const { container } = renderScreen(<StudioDashboard />, gateway);
 
@@ -81,7 +82,7 @@ describe("TechLog Studio index screens", () => {
   });
 
   it("searches and filters documents and renders the source empty state", async () => {
-    const gateway = createTechLogFeatureInstalledInput().input.createStudioGateway();
+    const gateway = createTechLogFeatureInstalledInput(MOCK_STUDIO_INSTALL_CONTEXT).input.createStudioGateway();
     renderScreen(<DocumentList />, gateway);
 
     expect(await screen.findByText("7개의 작업본")).toBeVisible();
@@ -96,7 +97,7 @@ describe("TechLog Studio index screens", () => {
   });
 
   it("cancels an obsolete list request and advances cursor pagination", async () => {
-    const base = createTechLogFeatureInstalledInput().input.createStudioGateway();
+    const base = createTechLogFeatureInstalledInput(MOCK_STUDIO_INSTALL_CONTEXT).input.createStudioGateway();
     const all = await base.listDocuments({ limit: 20 });
     let obsoleteSignal: AbortSignal | undefined;
     const firstPage: DocumentPage = { items: all.items.slice(0, 1), nextCursor: "next-page" };
@@ -122,7 +123,7 @@ describe("TechLog Studio index screens", () => {
 
   it("shows a retry action after a list failure and recovers", async () => {
     const user = userEvent.setup();
-    const base = createTechLogFeatureInstalledInput().input.createStudioGateway();
+    const base = createTechLogFeatureInstalledInput(MOCK_STUDIO_INSTALL_CONTEXT).input.createStudioGateway();
     const recovered = await base.listDocuments({ limit: 20 });
     const gateway = {
       ...base,
@@ -141,7 +142,7 @@ describe("TechLog Studio index screens", () => {
 
   it("creates the selected Question in the same session and redirects to its editor", async () => {
     const user = userEvent.setup();
-    const gateway = createTechLogFeatureInstalledInput().input.createStudioGateway();
+    const gateway = createTechLogFeatureInstalledInput(MOCK_STUDIO_INSTALL_CONTEXT).input.createStudioGateway();
     renderScreen(
       <>
         <NewDocumentForm />