fix: wrong value strategy EQUAL/NOT_EQUAL operations eval

[petruki]

This pull request updates the logic for handling equality and inequality operations in the _process_value function in snapshot.py. The changes make the equality check stricter and the inequality check more explicit.

Logic updates for value comparison:

• Changed the equality operation to check if input_value is exactly equal to the first element of values, instead of checking for membership in the list.
• Updated the inequality operation to explicitly return True only if input_value does not match any element in values, making the logic more precise.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

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