[WIP] Update inferred-spans module to follow style guide

[Copilot]

• Add missing static imports for commonly used utility methods
• Add final modifier to public non-internal classes where appropriate
• Fix field ordering (static fields before instance fields, final before non-final)
• Remove final from method parameters and local variables
• Fix method ordering (calling methods above called methods)
• Ensure correct visibility modifiers
• Review and apply style guide to all classes in the module

Classes to update:

• InferredSpansAutoConfig.java
• InferredSpansProcessor.java
• InferredSpansProcessorBuilder.java
• WildcardMatcher.java
• Internal package classes as needed

Fixes #385.

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