fix(watcher): handle wrapped Subject lines in forwarded emails

Update the parseForwardedHeader function to correctly join wrapped Subject lines before the To: line, ensuring accurate parsing of Gmail forwarded messages. Enhance tests to validate this behavior with Tokopedia email examples.

apps/watcher/test/match.test.js

@@ -43,6 +43,16 @@ describe("parseForwardedHeader", () => {
     assert.equal(h.subject, "Pembayaran Berhasil!");
   });
 
+  it("joins wrapped Subject lines before To", () => {
+    const h = parseForwardedHeader(tokopediaMultiForwardedBody);
+    assert.ok(h);
+    assert.match(h.from, /noreply@tokopedia\.com/);
+    assert.equal(
+      h.subject,
+      "Pesanan Selesai: “sandal jepit ANDA pria casual...” dan 1 Item Lainnya",
+    );
+  });
+
   it("returns null when there is no Fwd block", () => {
     assert.equal(parseForwardedHeader(livinDirectBody), null);
   });