feat: add heartbeat feature to auto-terminate program on failure

[wen2so]

Detect heartbeat status every 5 seconds. If no heartbeat is received within 5 seconds, the program will exit automatically.

Implements: #424

[wen2so]

consider add an args param to enable or disable this feature

[sonarqubecloud[bot]]

Quality Gate passed

Issues
6 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[sonarqubecloud[bot]]

Quality Gate passed

Issues
6 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[wen2so]

Considering that this C++ program is intended to be used as a library and invoked by programs written in other languages, and given that in a standalone deployment (without container management tools like Docker), the C++ program must terminate synchronously if the calling program crashes or exits unexpectedly — to avoid running as an orphaned process — a heartbeat mechanism is therefore required.