BE: FTS: Sort based on prefix offsets

[germanosin]

• Breaking change? (if so, please describe the impact and migration path for existing application instances)

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[Copilot]

Pull Request Overview

This pull request implements sorting functionality based on prefix offsets for Lucene topic search. The changes improve search result ranking by prioritizing matches where search terms appear earlier in topic names.

• Introduces a custom scoring function that calculates position-based scores for search prefixes
• Adds support for offset tracking in the word analyzer and text field indexing
• Implements comprehensive test coverage for the new ordering functionality

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
ShortWordAnalyzer.java	Modified to support offset tracking and moved to lucene package
IndexedTextField.java	New custom text field implementation with offset support
NameDistanceScoringFunction.java	New scoring function that ranks results by prefix position
PrefixQueryParser.java	Enhanced to track search prefixes for scoring
LuceneTopicsIndex.java	Updated to use new components and apply position-based scoring
ShortWordAnalyzerTest.java	New test class validating analyzer offset behavior
LuceneTopicsIndexTest.java	Enhanced with ordering tests and moved to lucene package

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