Increase test coverage up to 60%

[Patco96]

Description

Vectory currently has a test coverage of 43%. Let's push to stay above 60% with good tests.

Currently, some of the most important areas we are missing tests for are:

• CLI: 0% coverage
• Indices: 10% coverage
• Demo: 34% coverage
• Elasticsearch utils: 21% coverage

Wanted Solution

Add thorough tests for the specific areas mentiones above.

Alternatives

• Adding tests for other sections of the code.

Additional Context

No response.