fix(core): align count strategy connective steps

[contrueCT]

Purpose of the PR

• close [Improve] Align HugeCountStrategy with upstream TINKERPOP-2911 ConnectiveStep fixes #2995

PR #2993 introduced HugeCountStrategy to guard HugeGraph against unsafe negative-bound count().is(P) optimizations.

This follow-up ports the upstream TINKERPOP-2911 ConnectiveStep handling into HugeGraph's local strategy, so and() / or() child traversals are rewritten consistently with upstream CountStrategy.

Main Changes

• Handle ConnectiveStep separately when converting count().is(0) into not(...)
• Wrap the whole child traversal in not(...) using a cloned traversal, instead of only rewriting the tail step
• Reuse the same helper for FilterStep conversion
• Keep the existing negative-bound safeguards from PR fix(server): guard count strategy on negative bounds #2993 unchanged
• Add regression coverage for connective and() / or() traversal shapes, including multi-step where(or(...)) cases

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:
  • xxx

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

[codecov]

Codecov Report

❌ Patch coverage is 57.14286% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 29.70%. Comparing base (e108076) to head (e428115).
⚠️ Report is 5 commits behind head on master.

Files with missing lines	Patch %	Lines
...ugegraph/traversal/optimize/HugeCountStrategy.java	57.14%	4 Missing and 2 partials ⚠️

❗ There is a different number of reports uploaded between BASE (e108076) and HEAD (e428115). Click for more details.

HEAD has 2 uploads less than BASE

Flag	BASE (e108076)	HEAD (e428115)
	3	1

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3037      +/-   ##
============================================
- Coverage     35.85%   29.70%   -6.16%     
+ Complexity      338      264      -74     
============================================
  Files           802      803       +1     
  Lines         67995    68060      +65     
  Branches       8902     8908       +6     
============================================
- Hits          24381    20216    -4165     
- Misses        41008    45526    +4518     
+ Partials       2606     2318     -288     

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