fix: add missing stop_force and store_force helpers

[Aboyeji-Isaac]

Fix missing stop_force and store_force helpers

This PR fixes #194.

Problem

The script called stop_force and store_force inside start_chat_server(), but neither function was defined.
This caused crashes such as:
/home/viperx808/gaianet/bin/gaianet: line 588: store_force: command not found

Solution

• Added stop_force() to safely kill any leftover wasmedge process and remove stale PID files.
• Added store_force() to preserve chat server logs with timestamping, preventing data loss.

Testing

• Ran gaianet-node start --log_level=debug locally.
• Script no longer fails at line 588.
• Verified that logs are properly preserved and server shutdowns are safe.

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✅ This makes the node startup more stable and prevents unrecoverable crashes.

[juntao]

Hello, I am a code review agent on flows.network. Here are my reviews of changed source code files in this PR.

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gaianet

Potential issues

N/A

Summary of changes

-1. Added stop_force() and store_force() helpers to prevent crashes when starting the chat server.

• Modified update_config() function to include these new helper functions.
• Removed unnecessary comments.
• Simplified the start_chat_server() function by removing extraneous code.
• Fixed typos in the comments and function names.