fix(browser): pass executablePath from env var in all chromium.launch() calls

- system Chromium path from PLAYWRIGHT_CHROMIUM_EXECUTABLE_PATH was not forwarded
  to the launch options, causing 'executable doesn't exist' errors in Docker

src/auth/auth.service.ts

@@ -69,7 +69,7 @@ export class AuthService {
       throw new BadRequestException(`Key file not found: ${descriptor.keyFile}`);
     }
 
-    const browser = await chromium.launch({ headless: true });
+    const browser = await chromium.launch({ headless: true, executablePath: process.env.PLAYWRIGHT_CHROMIUM_EXECUTABLE_PATH });
     try {
       const context = await browser.newContext();
       const page = await context.newPage();

src/browser/browser.service.ts

@@ -44,7 +44,7 @@ export class BrowserService {
       throw new InternalServerErrorException('Failed to deserialize session data', { cause: err });
     }
 
-    const browser = await chromium.launch({ headless: true });
+    const browser = await chromium.launch({ headless: true, executablePath: process.env.PLAYWRIGHT_CHROMIUM_EXECUTABLE_PATH });
     try {
       const context = await browser.newContext();
 
@@ -112,7 +112,7 @@ export class BrowserService {
       throw new InternalServerErrorException('Failed to deserialize session data', { cause: err });
     }
 
-    const browser = await chromium.launch({ headless: true });
+    const browser = await chromium.launch({ headless: true, executablePath: process.env.PLAYWRIGHT_CHROMIUM_EXECUTABLE_PATH });
     try {
       const context = await browser.newContext();
       await context.addCookies(cookies);

src/scenario/scenario-scheduler.service.ts

@@ -144,7 +144,7 @@ export class ScenarioSchedulerService {
     const cookies: unknown[] = JSON.parse(session.cookies);
     const localStorageData: Record<string, string> = JSON.parse(session.localStorage);
 
-    const browser = await chromium.launch({ headless: true });
+    const browser = await chromium.launch({ headless: true, executablePath: process.env.PLAYWRIGHT_CHROMIUM_EXECUTABLE_PATH });
     try {
       const context = await browser.newContext();
       await context.addCookies(cookies as Parameters<typeof context.addCookies>[0]);