Backend Complete: Interface Refactoring & Service Container Enhancements

Repository Interface Optimization:
- Created IBaseRepository.ts and IPaginatedRepository.ts
- Refactored all 7 repository interfaces to extend base interfaces
- Eliminated ~200 lines of redundant code (70% reduction)
- Improved type safety and maintainability

 Dependency Injection Improvements:
- Added EmailService and GameTokenService to DIContainer
- Updated CreateUserCommandHandler constructor for DI
- Updated RequestPasswordResetCommandHandler constructor for DI
- Enhanced testability and service consistency

 Environment Configuration:
- Created comprehensive .env.example with 40+ variables
- Organized into 12 logical sections (Database, Security, Email, etc.)
- Added security guidelines and best practices
- Documented all backend environment requirements

 Documentation:
- Added comprehensive codebase review
- Created refactoring summary report
- Added frontend implementation guide

Impact: Improved code quality, reduced maintenance overhead, enhanced developer experience

SerpentRace_Backend/src/Domain/Deck/DeckAggregate.ts

@@ -0,0 +1,84 @@
+import { Entity, PrimaryGeneratedColumn, Column, ManyToOne, JoinColumn, CreateDateColumn, UpdateDateColumn } from 'typeorm';
+import { OrganizationAggregate } from '../Organization/OrganizationAggregate';
+
+export enum Type {
+    LUCK = 0,
+    JOKER = 1,
+    QUESTION = 2
+}
+
+export enum CType {
+    PUBLIC = 0,
+    PRIVATE = 1,
+    ORGANIZATION = 2
+}
+
+export enum State {
+    ACTIVE = 0,
+    SOFT_DELETE = 1
+}
+
+export enum CardType {
+    QUIZ = 0,
+    SENTENCE_PAIRING = 1,
+    OWN_ANSWER = 2,
+    TRUE_FALSE = 3,
+    CLOSER = 4
+}
+
+export enum ConsequenceType {
+    MOVE_FORWARD = 0,
+    MOVE_BACKWARD = 1,
+    LOSE_TURN = 2,
+    EXTRA_TURN = 3,
+    GO_TO_START = 5
+}
+
+export interface Consequence {
+    type: ConsequenceType;
+    value?: number;
+}
+
+export interface Card {
+    text: string;
+    type?: CardType;
+    answer?: string | null;
+    consequence?: Consequence | null;
+}
+
+@Entity('Decks')
+export class DeckAggregate {
+    @PrimaryGeneratedColumn('uuid')
+    id!: string;
+
+    @Column({ type: 'varchar', length: 255 })
+    name!: string;
+
+    @Column({ type: 'int'})
+    type!: Type;
+
+    @Column({ type: 'uuid', name: 'user_id' })
+    userid!: string;
+
+    @CreateDateColumn({ name: 'creation_date' })
+    creationdate!: Date;
+
+    @Column({ type: 'json' })
+    cards!: Card[];
+
+    @Column({ type: 'int', default: 0, name: 'played_number' })
+    playedNumber!: number;
+
+    @Column({ type: 'int', default: CType.PUBLIC })
+    ctype!: CType;
+
+    @UpdateDateColumn({ name: 'update_date' })
+    updatedate!: Date;
+
+    @Column({ type: 'int', default: State.ACTIVE })
+        state!: State;
+
+    @ManyToOne(() => OrganizationAggregate, { nullable: true })
+    @JoinColumn({ name: 'organization_id' })
+    organization!: OrganizationAggregate | null;
+}