Add busyTimeout config setting

Entire-Checkpoint: 81097a6c52a2

internal/config/config.go

@@ -88,6 +88,7 @@ type DbConfig struct {
 	MaxOpenConnections        int `json:"max-open-connections"`
 	MaxIdleConnections        int `json:"max-idle-connections"`
 	ConnectionMaxIdleTimeMins int `json:"max-idle-time-minutes"`
+	BusyTimeoutMs             int `json:"busy-timeout-ms"`
 }
 
 type NodeStateRetention struct {

internal/config/schema.go

@@ -201,6 +201,10 @@ var configSchema = `
         "max-idle-time-minutes": {
           "description": "Maximum idle time for a connection in minutes (default: 10).",
           "type": "integer"
+        },
+        "busy-timeout-ms": {
+          "description": "SQLite busy timeout in milliseconds. When a write is blocked, SQLite retries with backoff for up to this duration before returning SQLITE_BUSY (default: 60000).",
+          "type": "integer"
         }
       }
     }