feat: complete Epic 1 production foundation

crates/crank-adapter-rest/src/error.rs

@@ -13,14 +13,18 @@ pub enum RestAdapterError {
     InvalidHeaderName { header: String },
     #[error("invalid header value for {header}")]
     InvalidHeaderValue { header: String },
-    #[error("outbound target is not allowed: {target}")]
+    #[error("outbound target is not allowed")]
     TargetNotAllowed { target: String },
+    #[error("outbound redirects are not allowed")]
+    RedirectNotAllowed,
+    #[error("rest request exceeds the configured limit of {limit_bytes} bytes")]
+    RequestTooLarge { limit_bytes: usize },
     #[error("rest response exceeds the configured limit of {limit_bytes} bytes")]
     ResponseTooLarge { limit_bytes: usize },
     #[error("invalid outbound HTTP configuration: {details}")]
     InvalidConfiguration { details: String },
     #[error("request failed")]
-    Transport(#[from] reqwest::Error),
+    Transport { timeout: bool, connect: bool },
     #[error("sse collection window expired before stream completed")]
     WindowExpired,
     #[error("rest endpoint returned status {status}")]
@@ -28,3 +32,12 @@ pub enum RestAdapterError {
     #[error("sse stream produced malformed event payload")]
     InvalidSseEvent,
 }
+
+impl From<reqwest::Error> for RestAdapterError {
+    fn from(value: reqwest::Error) -> Self {
+        Self::Transport {
+            timeout: value.is_timeout(),
+            connect: value.is_connect(),
+        }
+    }
+}