Add gitea download git diff limit

Cargo.lock

@@ -399,6 +399,7 @@ dependencies = [
  "axum",
  "bytes",
  "dotenvy",
+ "futures-util",
  "hex",
  "hmac",
  "openrouter-rs",
@@ -409,6 +410,8 @@ dependencies = [
  "subtle",
  "thiserror 2.0.18",
  "tokio",
+ "tokio-stream",
+ "tokio-util",
 ]
 
 [[package]]
@@ -1379,6 +1382,17 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "tokio-stream"
+version = "0.1.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32da49809aab5c3bc678af03902d4ccddea2a87d028d86392a4b1560c6906c70"
+dependencies = [
+ "futures-core",
+ "pin-project-lite",
+ "tokio",
+]
+
 [[package]]
 name = "tokio-util"
 version = "0.7.18"