fix: standardize ACTION_INTERVAL unit to minutes in twitter client

[sin-bufan]

Relates to:

Related to inconsistent time unit usage for ACTION_INTERVAL across the codebase.

Risks

Low - This is a documentation and logging clarity improvement that doesn't change core functionality.

Background

What does this PR do?

Standardizes the ACTION_INTERVAL unit to consistently use minutes across:

1. Environment variable documentation
2. Log messages in Twitter client
3. Internal time calculations

What kind of change is this?

Bug fixes (non-breaking change which fixes an issue)

• Fixes inconsistent time unit usage that could cause confusion

Documentation changes needed?

My changes require a change to the project documentation.

• Updated env.example to clarify ACTION_INTERVAL uses minutes

Testing

Where should a reviewer start?

Review the Twitter client post processing code: packages/client-twitter/src/post.ts

Detailed testing steps

1. Set ACTION_INTERVAL in .env file
2. Start Twitter client
3. Verify log messages correctly display intervals in minutes
4. Confirm action processing occurs at expected minute intervals

Discord username

sin_bufan

[monilpat]

LGTM!