Make auto-connect peers retry indefinitely on initial connection failure

Previously, static peers configured with AutoConnect gave up after 6
attempts (1 initial + 5 retries). If the remote peer was offline at
startup, the node permanently abandoned the connection. The reconnect
path (after MMP link-dead) already retried indefinitely but only
activated after a peer had been previously connected.

Remove the reconnect parameter from schedule_retry() and always set
reconnect=true when creating retry entries, since only auto-connect
peers reach this code path. The 300s backoff cap prevents resource waste.
The max_retries=0 config still works as an explicit kill switch.

src/node/retry.rs

@@ -59,11 +59,10 @@ impl Node {
         &mut self,
         node_addr: NodeAddr,
         now_ms: u64,
-        reconnect: bool,
     ) {
         let retry_cfg = &self.config.node.retry;
         let max_retries = retry_cfg.max_retries;
-        if max_retries == 0 && !reconnect {
+        if max_retries == 0 {
             return;
         }
 
@@ -112,12 +111,11 @@ impl Node {
             if let Some(pc) = peer_config {
                 let mut state = RetryState::new(pc);
                 state.retry_count = 1;
-                state.reconnect = reconnect;
+                state.reconnect = true;
                 let delay = state.backoff_ms(base_interval_ms, max_backoff_ms);
                 state.retry_after_ms = now_ms + delay;
                 debug!(
                     peer = %self.peer_display_name(&node_addr),
-                    reconnect = reconnect,
                     delay_secs = delay / 1000,
                     "First connection attempt failed, scheduling retry"
                 );
@@ -237,7 +235,7 @@ impl Node {
                     );
                     // Immediate failure counts as an attempt — schedule next retry
                     // (reconnect flag is preserved on existing retry_pending entry)
-                    self.schedule_retry(node_addr, now_ms, false);
+                    self.schedule_retry(node_addr, now_ms);
                 }
             }
         }