fix(server): fix match no index

[LegendPei]

Purpose of the PR

• close [Bug] NoIndexException triggered by match()-step #2936

This PR fixes a NoIndexException triggered by match() traversals when preceding has() filters contain index-required predicates such as neq() or range predicates but the related properties are not indexed.

In this case, HugeGraph extracted these filters into HugeGraphStep and pushed them into backend ConditionQuery, causing backend index validation to reject the traversal before TinkerPop could evaluate the filters normally.

Main Changes

• Avoid extracting HasStep filters into HugeGraphStep when:

  • the following traversal step is match(), and
  • the has() predicate contains neq, gt, gte, lt, or lte.

• Keep those filters in the traversal so they are evaluated by the normal TinkerPop filter path instead of being forced into backend index query planning.

• Add a regression test covering the match() + no-index condition scenario from [Bug] NoIndexException triggered by match()-step #2936.

Verifying these changes

• Trivial rework / code cleanup without any test coverage. (No Need)
• Already covered by existing tests, such as (please modify tests here).
• Need tests and can be verified as follows:
  • mvn test -pl hugegraph-server/hugegraph-test -am -P core-test,rocksdb -Dtest=CountStrategyCoreTest#testMatchWithNoIndexConditionMatchesDirectTraversal -DfailIfNoTests=false
  • mvn test -pl hugegraph-server/hugegraph-test -am -P core-test,rocksdb -Dtest=CountStrategyCoreTest -DfailIfNoTests=false

Does this PR potentially affect the following parts?

• Dependencies (add/update license info & regenerate_known_dependencies.sh)
• Modify configurations
• The public API
• Other affects (typed here)
• Nope

Documentation Status

• Doc - TODO
• Doc - Done
• Doc - No Need

[Copilot]

Pull request overview

Fixes #2936 — a NoIndexException raised when leading has(...) filters using index-required predicates (neq, gt, gte, lt, lte) precede a match() step. Previously these HasContainers were extracted into HugeGraphStep and pushed to the backend, where index validation rejected them. The fix prevents that extraction in this specific shape so TinkerPop evaluates the filter normally.

Changes:

• In TraversalUtil.extractHasContainer(HugeGraphStep, ...), stop consuming HasSteps when the step is followed (after HasStep/NoOpBarrierStep) by a MatchStep and contains an index-required predicate.
• Add helpers followedByMatchStep and hasIndexRequiredPredicate (with MatchStep import).
• Add regression test testMatchWithNoIndexConditionMatchesDirectTraversal in CountStrategyCoreTest.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
hugegraph-server/hugegraph-core/.../optimize/TraversalUtil.java	Skip HasStep extraction into HugeGraphStep before match() when predicate requires an index.
hugegraph-server/hugegraph-test/.../core/CountStrategyCoreTest.java	New schema/graph setup and regression test verifying match() no longer throws NoIndexException.

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[codecov]

Codecov Report

❌ Patch coverage is 74.62687% with 17 lines in your changes missing coverage. Please review.
✅ Project coverage is 29.63%. Comparing base (f56462a) to head (a959357).
⚠️ Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
...he/hugegraph/traversal/optimize/TraversalUtil.java	74.62%	5 Missing and 12 partials ⚠️

❗ There is a different number of reports uploaded between BASE (f56462a) and HEAD (a959357). Click for more details.

HEAD has 2 uploads less than BASE

Flag	BASE (f56462a)	HEAD (a959357)
	3	1

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3039      +/-   ##
============================================
- Coverage     35.94%   29.63%   -6.32%     
- Complexity      338      375      +37     
============================================
  Files           803      803              
  Lines         68053    68116      +63     
  Branches       8907     8928      +21     
============================================
- Hits          24465    20188    -4277     
- Misses        40967    45622    +4655     
+ Partials       2621     2306     -315     

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