CLI: Avoid unwrapping (#162)

- If calling `state.detect_stall` is Err, the keeper will panic, then
stops running.
- To keep running, we should avoid unwrapping

Author: aoikurokawa

cli/src/keeper/keeper_loop.rs

@@ -377,7 +377,7 @@ pub async fn startup_keeper(
                 continue;
             }
 
-            epoch_stall = !run_operations || result.unwrap();
+            epoch_stall = !run_operations || result.unwrap_or(false);
 
             emit_heartbeat(
                 tick,

cli/src/keeper/keeper_state.rs

@@ -385,6 +385,14 @@ impl KeeperState {
         Ok(*state)
     }
 
+    /// Detects if the current epoch is in a stalled state.
+    ///
+    /// # Stall Detection
+    /// 1. **Epoch Completed**: If `is_epoch_completed` is true
+    /// 2. **Vote State**: When the current state is `State::Vote`
+    /// 3. **Post-Vote Cooldown**: When in `State::PostVoteCooldown`
+    /// 4. **Insufficient Rewards**: During `State::Distribute`, if total rewards to be distributed
+    ///    are less than **10,000** (dust threshold)
     pub async fn detect_stall(&mut self, handler: &CliHandler) -> Result<bool> {
         if self.is_epoch_completed {
             return Ok(true);