Huge refactor, submission system addition & security improvements. +Implementation of moderation cmds.

migrations/004_punishments.sql

@@ -0,0 +1,15 @@
+CREATE TABLE punishments (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    chat_id INTEGER NOT NULL,
+    target_user_id INTEGER NOT NULL,
+    action_type TEXT NOT NULL, -- 'ban', 'mute', 'kick'
+    duration_seconds INTEGER, -- NULL = permanent
+    reason TEXT,
+    created_by INTEGER NOT NULL,
+    created_at TEXT NOT NULL DEFAULT (datetime('now')),
+    revoked_at TEXT,
+    revoked_by INTEGER,
+    active INTEGER NOT NULL DEFAULT 1
+);
+CREATE INDEX idx_punishments_chat_target ON punishments(chat_id, target_user_id);
+CREATE INDEX idx_punishments_active ON punishments(active);