feat(app): handle rate limits (#6790)

* feat(app): handle rate limits + governor rate limits

* feat(app): add hysteresis to rate limiter

* fix(ci): make sure sccache directory exists if mount fail

* fix(ci): also apply sccache mount fix to daedalus-docker

* fix(ci): sudo

packages/app-lib/src/error.rs

@@ -79,6 +79,9 @@ pub enum ErrorKind {
     #[error("Too many API errors, try again in {0} minutes")]
     ApiIsDownError(u32),
 
+    #[error("Too many requests, retry in {}", format_seconds(*.retry_in_seconds))]
+    Ratelimited { retry_in_seconds: u64 },
+
     #[error("{0}")]
     LabrinthError(LabrinthError),
 
@@ -192,6 +195,27 @@ pub enum ErrorKind {
     DiscordRichPresenceError(#[from] discord_rich_presence::error::Error),
 }
 
+fn format_seconds(seconds: u64) -> String {
+    let plural = |unit: u64| if unit == 1 { "" } else { "s" };
+
+    if seconds <= 59 {
+        return format!("{seconds} second{}", plural(seconds));
+    }
+
+    let minutes = seconds / 60;
+    let rem_seconds = seconds % 60;
+
+    if rem_seconds == 0 {
+        return format!("{minutes} minutes");
+    }
+
+    format!(
+        "{minutes} minute{} and {rem_seconds} second{}",
+        plural(minutes),
+        plural(rem_seconds)
+    )
+}
+
 #[derive(Debug)]
 pub struct Error {
     pub raw: Arc<ErrorKind>,