fix(deps): upgrade getrandom to 0.4 with fill() rename

crates/sprout-agent/Cargo.toml

@@ -31,7 +31,7 @@ serde_json = { workspace = true }
 reqwest = { workspace = true, features = ["json", "rustls", "form"] }
 rmcp = { version = "1", default-features = false, features = ["client", "transport-child-process"] }
 arc-swap = "1"
-getrandom = "0.2"
+getrandom = "0.4"
 tracing = { workspace = true }
 tracing-subscriber = { workspace = true }
 # OAuth 2.0 PKCE for Databricks (and future browser-auth providers).

crates/sprout-agent/src/auth.rs

@@ -340,7 +340,7 @@ fn token_from_response(
 /// challenge (RFC 7636 §4.2).
 fn pkce_pair() -> Result<(String, String), AgentError> {
     let mut bytes = [0u8; 48];
-    getrandom::getrandom(&mut bytes).map_err(|e| AgentError::Llm(format!("pkce rng: {e}")))?;
+    getrandom::fill(&mut bytes).map_err(|e| AgentError::Llm(format!("pkce rng: {e}")))?;
     let verifier = base64::engine::general_purpose::URL_SAFE_NO_PAD.encode(bytes);
     let challenge = base64::engine::general_purpose::URL_SAFE_NO_PAD
         .encode(sha2::Sha256::digest(verifier.as_bytes()));
@@ -349,7 +349,7 @@ fn pkce_pair() -> Result<(String, String), AgentError> {
 
 fn random_state() -> Result<String, AgentError> {
     let mut bytes = [0u8; 16];
-    getrandom::getrandom(&mut bytes).map_err(|e| AgentError::Llm(format!("state rng: {e}")))?;
+    getrandom::fill(&mut bytes).map_err(|e| AgentError::Llm(format!("state rng: {e}")))?;
     Ok(base64::engine::general_purpose::URL_SAFE_NO_PAD.encode(bytes))
 }
 

crates/sprout-agent/src/lib.rs

@@ -403,6 +403,6 @@ async fn acquire_session(
 
 fn session_token() -> Result<String, String> {
     let mut b = [0u8; 8];
-    getrandom::getrandom(&mut b).map_err(|e| format!("rng: getrandom failed: {e}"))?;
+    getrandom::fill(&mut b).map_err(|e| format!("rng: getrandom failed: {e}"))?;
     Ok(b.iter().map(|x| format!("{x:02x}")).collect())
 }

crates/sprout-agent/src/llm.rs

@@ -666,7 +666,7 @@ async fn backoff_with_jitter(attempt: u32) {
         .min(MAX_BACKOFF_MS);
     let mut buf = [0u8; 8];
     let jitter_range = base / 2;
-    let delay = if jitter_range > 0 && getrandom::getrandom(&mut buf).is_ok() {
+    let delay = if jitter_range > 0 && getrandom::fill(&mut buf).is_ok() {
         let r = u64::from_le_bytes(buf) % jitter_range;
         base - jitter_range + r
     } else {

crates/sprout-agent/src/mcp.rs

@@ -781,7 +781,7 @@ fn backoff(attempt: u32, base: Duration, max: Duration) -> Duration {
 
 fn jitter_percent() -> i64 {
     let mut buf = [0u8; 1];
-    let _ = getrandom::getrandom(&mut buf);
+    let _ = getrandom::fill(&mut buf);
     ((buf[0] as i64) % 41) - 20
 }