feat(browser,mcp): resolve environment and credentials from DB in exec

- POST /exec now accepts environmentId (UUID) and credentials (alias → UUID)
  instead of raw payloads; resolves entities via EnvironmentService and
  CredentialService before passing data to browserService.exec
- exec_code MCP tool updated with same schema: environmentId + credentials map
- CredentialModule imported into BrowserModule and McpModule
- docs(scenario): rewrite script runtime section for single context argument
- docs(mcp): update exec_code description to reflect new parameter shapes
- style: reorder imports across server source (formatter)

server/src/session/session-context.service.ts

@@ -1,8 +1,8 @@
 import {
-  Injectable,
-  OnModuleDestroy,
   BadRequestException,
+  Injectable,
   NotFoundException,
+  OnModuleDestroy,
 } from "@nestjs/common";
 import type { Browser, BrowserContext, Page } from "playwright";
 import { TraceLogger } from "../common/trace-logger";

server/src/session/session-scheduler.service.ts

@@ -1,10 +1,10 @@
 import { Injectable } from "@nestjs/common";
-import { Interval } from "@nestjs/schedule";
 import { ConfigService } from "@nestjs/config";
-import { AppConfig } from "../config/app.config";
+import { Interval } from "@nestjs/schedule";
 import { TraceLogger } from "../common/trace-logger";
-import { SessionService } from "./session.service";
+import { AppConfig } from "../config/app.config";
 import { SessionContextService } from "./session-context.service";
+import { SessionService } from "./session.service";
 
 /**
  * Periodically:

server/src/session/session.controller.ts

@@ -9,10 +9,9 @@ import {
   Query,
 } from "@nestjs/common";
 import { ApiOperation, ApiResponse, ApiTags } from "@nestjs/swagger";
-import { SessionService } from "./session.service";
-import { SessionContextService } from "./session-context.service";
 import { PaginationQueryDto } from "../common/dto/pagination.dto";
-import { SessionOrderBy } from "./session.service";
+import { SessionContextService } from "./session-context.service";
+import { SessionOrderBy, SessionService } from "./session.service";
 
 function maskToken(token: string, head = 6, tail = 4): string {
   if (token.length <= head + tail + 1) return token;

server/src/session/session.entity.ts

@@ -1,8 +1,8 @@
 import {
-  Entity,
-  PrimaryGeneratedColumn,
   Column,
   CreateDateColumn,
+  Entity,
+  PrimaryGeneratedColumn,
   UpdateDateColumn,
 } from "typeorm";
 

server/src/session/session.module.ts

@@ -1,10 +1,10 @@
 import { Module } from "@nestjs/common";
 import { TypeOrmModule } from "@nestjs/typeorm";
-import { SessionEntity } from "./session.entity";
-import { SessionService } from "./session.service";
-import { SessionController } from "./session.controller";
 import { SessionContextService } from "./session-context.service";
 import { SessionSchedulerService } from "./session-scheduler.service";
+import { SessionController } from "./session.controller";
+import { SessionEntity } from "./session.entity";
+import { SessionService } from "./session.service";
 
 @Module({
   imports: [TypeOrmModule.forFeature([SessionEntity])],

server/src/session/session.service.ts

@@ -1,13 +1,13 @@
 import { Injectable, OnApplicationBootstrap } from "@nestjs/common";
 import { InjectRepository } from "@nestjs/typeorm";
-import { LessThan, Repository } from "typeorm";
-import { SessionEntity } from "./session.entity";
-import { TraceLogger } from "../common/trace-logger";
 import type { Cookie } from "playwright";
+import { LessThan, Repository } from "typeorm";
 import {
-  PaginationQueryDto,
   PaginatedResult,
+  PaginationQueryDto,
 } from "../common/dto/pagination.dto";
+import { TraceLogger } from "../common/trace-logger";
+import { SessionEntity } from "./session.entity";
 
 export type SessionOrderBy =
   | "id"