add db models, refactor json models, add references in migrations

db/migrations/000002_create_modules.up.sql

@@ -1,13 +1,14 @@
 CREATE TABLE IF NOT EXISTS modules (
     id INTEGER PRIMARY KEY AUTOINCREMENT,
+    state_id INTEGER NOT NULL,
     text_id VARCHAR(256) NOT NULL,
     title VARCHAR(256) NOT NULL,
     description TEXT NOT NULL,
     url VARCHAR(256) NOT NULL, 
     version VARCHAR(64) NOT NULL,
     availability INTEGER NOT NULL,
-
-    created_at DATETIME NOT NULL DEFAULT current_timestamp
+    created_at DATETIME NOT NULL DEFAULT current_timestamp,
+    FOREIGN KEY (state_id) REFERENCES foundry_state(id) ON DELETE CASCADE
 );
 
 CREATE TABLE IF NOT EXISTS modules_compatibility (

db/migrations/000003_create_systems.up.sql

@@ -1,12 +1,13 @@
 CREATE TABLE IF NOT EXISTS systems (
     id INTEGER PRIMARY KEY AUTOINCREMENT,
+    state_id INTEGER NOT NULL,
     text_id VARCHAR(256) NOT NULL,
     title VARCHAR(256) NOT NULL,
     description TEXT NOT NULL,
     url VARCHAR(256) NOT NULL, 
     download VARCHAR(256) NOT NULL,
-
-    created_at DATETIME NOT NULL DEFAULT current_timestamp
+    created_at DATETIME NOT NULL DEFAULT current_timestamp,
+    FOREIGN KEY (state_id) REFERENCES foundry_state(id) ON DELETE CASCADE
 );
 
 CREATE TABLE IF NOT EXISTS systems_compatibility (

db/migrations/000004_create_worlds.up.sql

@@ -1,5 +1,6 @@
 CREATE TABLE IF NOT EXISTS worlds (
     id INTEGER PRIMARY KEY AUTOINCREMENT,
+    state_id INTEGER NOT NULL,
     text_id VARCHAR(256) NOT NULL,
     title VARCHAR(256) NOT NULL,
     description TEXT NOT NULL,
@@ -8,8 +9,8 @@ CREATE TABLE IF NOT EXISTS worlds (
     system_version VARCHAR(256) NOT NULL,
     playtime INTEGER NOT NULL,
     next_session DATETIME NOT NULL,
-
-    created_at DATETIME NOT NULL DEFAULT current_timestamp
+    created_at DATETIME NOT NULL DEFAULT current_timestamp,
+    FOREIGN KEY (state_id) REFERENCES foundry_state(id) ON DELETE CASCADE
 );
 
 CREATE TABLE IF NOT EXISTS worlds_compatibility (

db/migrations/000005_create_users.up.sql

@@ -1,12 +1,13 @@
 CREATE TABLE IF NOT EXISTS users (
     id INTEGER PRIMARY KEY AUTOINCREMENT,
+    state_id INTEGER NOT NULL,
     name VARCHAR(256) NOT NULL,
     role INTEGER NOT NULL,
     character VARCHAR(128) NOT NULL,
     color VARCHAR(128) NOT NULL,
     pronouns VARCHAR(128) NOT NULL,
-
-    created_at DATETIME NOT NULL DEFAULT current_timestamp
+    created_at DATETIME NOT NULL DEFAULT current_timestamp,
+    FOREIGN KEY (state_id) REFERENCES foundry_state(id) ON DELETE CASCADE
 );
 
 CREATE TABLE IF NOT EXISTS users_hotbar (