```mermaid
flowchart TD
A[Start watching] --> B[Create watcher]
B --> C[Watch config file]
C --> D{Event received?}
D -->|Yes| E{Event type?}
E -->|Modify| F[Reload config]
F --> G[Perform concurrent_fetch]
E -->|Remove| H[Log removal]
H --> I[Clear DB]
E -->|Other| J[Log other event]
G --> D
I --> D
J --> D
D -->|No| K[End watching]
```
