perf(entities): add @Index() decorators for query optimization

meridian-api/src/post/post.entity.ts

@@ -8,6 +8,7 @@ import {
   ManyToMany,
   JoinTable,
   DeleteDateColumn,
+  Index,
 } from 'typeorm';
 import { postType } from './Enums/post-type.enum';
 import { PostStatus } from './Enums/post-status.enum';
@@ -16,6 +17,7 @@ import { User } from 'src/users/user.entity';
 import { Tag } from 'src/tag/tag.entity';
 
 @Entity()
+@Index(['authorId', 'postType', 'postStatus'])
 export class Post {
   @PrimaryGeneratedColumn()
   id: number;

meridian-api/src/tweets/entities/tweet.entity.ts

@@ -9,9 +9,11 @@ import {
   PrimaryColumn,
   PrimaryGeneratedColumn,
   UpdateDateColumn,
+  Index,
 } from 'typeorm';
 
 @Entity()
+@Index(['userId'])
 export class Tweet {
   @PrimaryGeneratedColumn()
   id: number;

meridian-api/src/users/user.entity.ts

@@ -9,6 +9,7 @@ import {
   OneToOne,
   JoinColumn,
   DeleteDateColumn,
+  Index,
 } from 'typeorm';
 
 @Entity()
@@ -22,6 +23,7 @@ export class User {
   @Column('varchar', { length: 100 })
   lastName: string;
 
+  @Index()
   @Column('varchar', { unique: true, nullable: false })
   email: string;