excise entity framework from all remaining code

Catalogger.Backend/Database/Migrations/001_init.up.sql

@@ -0,0 +1,60 @@
+create table if not exists guilds
+(
+    id             bigint not null primary key,
+    channels       jsonb not null,
+    banned_systems text[] not null,
+    key_roles      bigint[] not null
+);
+
+create table if not exists ignored_messages
+(
+    id bigint not null primary key
+);
+
+create table if not exists invites
+(
+    code     text not null primary key,
+    guild_id bigint not null,
+    name     text not null
+);
+
+create index if not exists ix_invites_guild_id on invites (guild_id);
+
+create table if not exists messages
+(
+    id              bigint not null primary key,
+    original_id     bigint,
+    user_id         bigint not null,
+    channel_id      bigint not null,
+    guild_id        bigint not null,
+    member          text,
+    system          text,
+    username        bytea not null,
+    content         bytea not null,
+    metadata        bytea,
+    attachment_size integer not null
+);
+
+create table if not exists watchlists
+(
+    guild_id     bigint not null,
+    user_id      bigint not null,
+    added_at     timestamp with time zone default now() not null,
+    moderator_id bigint not null,
+    reason       text not null,
+    
+    primary key (guild_id, user_id)
+);
+
+create table if not exists api_tokens
+(
+    id              integer generated by default as identity primary key,
+    dashboard_token text not null,
+    user_id         text not null,
+    access_token    text not null,
+    refresh_token   text,
+    expires_at      timestamp with time zone not null
+);
+
+-- Finally, drop the EFCore migrations table.
+drop table if exists "__EFMigrationsHistory";