feat(db/migrations): adding migrations to the database

migrations/001_create_enums.sql

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+CREATE TYPE bot_presence AS ENUM ('online', 'idle', 'dnd', 'invisible');
+CREATE TYPE bot_activity AS ENUM ('Playing', 'Streaming', 'Listening', 'Watching', 'Competing');

migrations/002_create_tables.sql

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+CREATE TABLE bots (
+    id       SERIAL PRIMARY KEY,
+    status   TEXT         NOT NULL DEFAULT 'TTY by EniumTeam',
+    type     bot_activity NOT NULL DEFAULT 'Watching',
+    presence bot_presence NOT NULL DEFAULT 'dnd'
+);
+
+CREATE TABLE users (
+    user_id  TEXT PRIMARY KEY,
+    is_owner BOOLEAN NOT NULL DEFAULT FALSE,
+    is_buyer BOOLEAN NOT NULL DEFAULT FALSE,
+    is_dev   BOOLEAN NOT NULL DEFAULT FALSE,
+    is_enium BOOLEAN NOT NULL DEFAULT FALSE,
+    is_pwn   BOOLEAN NOT NULL DEFAULT FALSE
+);
+
+CREATE TABLE guilds (
+    guild_id TEXT PRIMARY KEY,
+
+    log_enable   BOOLEAN NOT NULL DEFAULT FALSE,
+    log_category TEXT,
+    log_bot      TEXT,
+    log_channels TEXT,
+    log_member   TEXT,
+    log_mod      TEXT,
+    log_msg      TEXT,
+    log_server   TEXT,
+
+    join_enabled   BOOLEAN NOT NULL DEFAULT FALSE,
+    join_message   TEXT    NOT NULL DEFAULT 'Bienvenue {user.mention} sur le serveur {guild.name}, tu es le {guild.count}e membre du serveur 👋',
+    join_channel   TEXT,
+    leave_enabled  BOOLEAN NOT NULL DEFAULT FALSE,
+    leave_message  TEXT    NOT NULL DEFAULT 'Au revoir {user.name} 👋',
+    leave_channel  TEXT,
+
+    protect_enabled           BOOLEAN NOT NULL DEFAULT FALSE,
+    protect_anti_channel      BOOLEAN NOT NULL DEFAULT FALSE,
+    protect_anti_rank         BOOLEAN NOT NULL DEFAULT FALSE,
+    protect_anti_perm         BOOLEAN NOT NULL DEFAULT FALSE,
+    protect_anti_massban      BOOLEAN NOT NULL DEFAULT FALSE,
+    protect_anti_mass_mention BOOLEAN NOT NULL DEFAULT FALSE,
+    protect_anti_bot          BOOLEAN NOT NULL DEFAULT FALSE,
+
+    footer TEXT    NOT NULL DEFAULT '© EniumTeam ~ 2025',
+    color  INTEGER NOT NULL DEFAULT 0
+);
+
+CREATE TABLE guild_users (
+    id       SERIAL PRIMARY KEY,
+    user_id  TEXT    NOT NULL REFERENCES users(user_id)   ON DELETE CASCADE,
+    guild_id TEXT    NOT NULL REFERENCES guilds(guild_id)  ON DELETE CASCADE,
+
+    xp              INTEGER NOT NULL DEFAULT 0,
+    level           INTEGER NOT NULL DEFAULT 0,
+    is_wl_user      BOOLEAN NOT NULL DEFAULT FALSE,
+
+    invitation_count INTEGER NOT NULL DEFAULT 0,
+    invited_by       TEXT,
+
+    UNIQUE(user_id, guild_id)
+);
+
+CREATE TABLE bot_buyers (
+    bot_id  INTEGER NOT NULL REFERENCES bots(id)        ON DELETE CASCADE,
+    user_id TEXT    NOT NULL REFERENCES users(user_id)   ON DELETE CASCADE,
+    PRIMARY KEY (bot_id, user_id)
+);
+
+CREATE TABLE bot_owners (
+    bot_id  INTEGER NOT NULL REFERENCES bots(id)        ON DELETE CASCADE,
+    user_id TEXT    NOT NULL REFERENCES users(user_id)   ON DELETE CASCADE,
+    PRIMARY KEY (bot_id, user_id)
+);
+
+CREATE TABLE guild_whitelist (
+    guild_id TEXT NOT NULL REFERENCES guilds(guild_id)  ON DELETE CASCADE,
+    user_id  TEXT NOT NULL REFERENCES users(user_id)    ON DELETE CASCADE,
+    PRIMARY KEY (guild_id, user_id)
+);

migrations/003_create_indexes.sql

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+CREATE INDEX idx_guild_users_user_id  ON guild_users(user_id);
+CREATE INDEX idx_guild_users_guild_id ON guild_users(guild_id);
+
+CREATE INDEX idx_bot_buyers_user_id   ON bot_buyers(user_id);
+CREATE INDEX idx_bot_owners_user_id   ON bot_owners(user_id);
+CREATE INDEX idx_guild_wl_user_id     ON guild_whitelist(user_id);