add list for previous titles

Cargo.lock

@@ -632,6 +632,7 @@ dependencies = [
  "dotenvy",
  "env_logger",
  "getset",
+ "itertools",
  "lazy-regex",
  "log",
  "reqwest 0.13.4",
@@ -1227,6 +1228,15 @@ version = "1.70.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a6cb138bb79a146c1bd460005623e142ef0181e3d0219cb493e02f7d08a35695"
 
+[[package]]
+name = "itertools"
+version = "0.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8b4baf93f58d4425749ca49a51c50ebab072c5df6994d08fed93541c331481dc"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "itoa"
 version = "1.0.18"