[imbajin]

Mirrors hugegraph/hugegraph#371 from the existing source branch. Verification details below are reported by the source PR; See this pull request’s checks for the current ASF CI status.

修改示意

## 问题

自定义交叉点查询超过 limit 时，原实现截取 size - 1，可能返回多于用户要求的交叉点。单源存在多条路径到达同一终点时，重复终点也会占用限额。

修改

• 先对交叉点去重，再按 limit 截取，并保留入选交叉点对应的全部路径。
• 单源场景保留终点首次出现的顺序；多源交集沿用原有集合语义。
• 增加 API 回归测试，覆盖重复路径和不同限额。

验证情况

• 将原实现和候选实现的交叉点方法提取到 Java 21 测试程序，使用最小类型桩验证单源重复路径、limit 为 1、2、3、4、-1，以及双源场景：原实现的 limit=1 返回两个交叉点，候选实现通过检查。此结果不代表完整项目或真实服务端测试通过。
• 新增 API 回归测试已注册于现有测试套件，但尚未编译或运行。当前执行环境无法通过 Git 获取完整仓库。
• 当前提交尚未完成 Server、PD/Store CI 或真实服务端验证；大规模查询性能也尚未实测。

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 58.25%. Comparing base (8e327b8) to head (8e7a271).
⚠️ Report is 19 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3472      +/-   ##
============================================
- Coverage     58.42%   58.25%   -0.17%     
- Complexity     6903     7234     +331     
============================================
  Files           779      779              
  Lines         69391    69961     +570     
  Branches       9567     9744     +177     
============================================
+ Hits          40539    40759     +220     
- Misses        25179    25507     +328     
- Partials       3673     3695      +22     

Flag	Coverage Δ		*Carryforward flag
commons	96.37% <ø> (ø)		Carriedforward from 8e327b8
hstore	36.07% <ø> (-0.01%)	⬇️	Carriedforward from 8e327b8
pd	56.75% <ø> (+<0.01%)	⬆️	Carriedforward from 8e327b8
server_hbase	42.61% <ø> (+0.03%)	⬆️	Carriedforward from 8e327b8
server_memory	56.67% <100.00%> (+0.15%)	⬆️
server_rocksdb	42.99% <100.00%> (-0.05%)	⬇️
store	35.96% <ø> (-0.01%)	⬇️	Carriedforward from 8e327b8

*This pull request uses carry forward flags. Click here to find out more.

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