feat: encrypt PII fields before saving it in the database (#1043)

Co-authored-by: Nishant Joshi <nishant.joshi@juspay.in>

crates/router/src/bin/router.rs

@@ -36,6 +36,24 @@ async fn main() -> ApplicationResult<()> {
 
     let _guard = logger::setup(&conf.log);
 
+    #[cfg(feature = "pii-encryption-script")]
+    {
+        let store =
+            router::services::Store::new(&conf, false, tokio::sync::oneshot::channel().0).await;
+
+        // ^-------- KMS decryption of the master key is a fallible and the server will panic in
+        // the above mentioned line
+
+        router::scripts::pii_encryption::test_2_step_encryption(&store).await;
+
+        #[allow(clippy::expect_used)]
+        router::scripts::pii_encryption::encrypt_merchant_account_fields(&store)
+            .await
+            .expect("Failed while encrypting merchant account");
+
+        crate::logger::error!("Done with everything");
+    }
+
     logger::info!("Application started [{:?}] [{:?}]", conf.server, conf.log);
 
     #[allow(clippy::expect_used)]