feat: add support for Postgres database provider (#79)

backend/migrations/sqlite/20240908123031_audit_log.up.sql

@@ -0,0 +1,10 @@
+CREATE TABLE audit_logs
+(
+    id               TEXT NOT NULL PRIMARY KEY,
+    created_at       DATETIME,
+    event            TEXT NOT NULL,
+    ip_address       TEXT NOT NULL,
+    user_agent       TEXT NOT NULL,
+    data             BLOB NOT NULL,
+    user_id          TEXT REFERENCES users
+);