Add API for metric aggregation type

[akash-manna-sky]

Add API for metric aggregation type

Fixes #270

Testing done

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• Ensure you have provided tests that demonstrate the feature works or the issue is fixed

[akash-manna-sky]

Please review the changes. I tried to add API for matric aggregation type as you described in the issue description. There are a few SpotBugs issues, I tried to fix but can't. I used @SuppressFBWarnings but still SpotBugs are complaining and also I am facing a problem in Unicode transformations handling in MetricAggregation.java at L98 & L99. Can you please help me? @uhafner

[akash-manna-sky]

Hi, can we work on this PR? @uhafner

[github-actions]

☀️   Quality Monitor

Tests

     Unit Tests: ✅ successful — 445 passed $\color{green}{\textsf{(+54)}}$
   ⛔   Architecture Tests: ✅ successful — 10 passed $\textsf{(±0)}$

Coverage for New Code

   〰️   Line Coverage: 97.14% — 2 missed lines
   ➰   Branch Coverage: 93.48% — 3 missed branches
     Mutation Coverage: 95.35% — 2 survived mutations
   💪   Test Strength: 100.00% — perfect 🎉

Coverage for Whole Project

   〰️   Line Coverage: 95.81% $\color{green}{\textsf{(+0.03)}}$ — 133 missed lines
   ➰   Branch Coverage: 91.45% $\color{green}{\textsf{(+0.08)}}$ — 116 missed branches
     Mutation Coverage: 89.60% $\color{green}{\textsf{(+0.16)}}$ — 162 survived mutations
   💪   Test Strength: 92.63% $\color{green}{\textsf{(+0.14)}}$ — 111 survived mutations in tested code

Style

     CheckStyle: No warnings $\textsf{(±0)}$
     PMD: No warnings $\textsf{(±0)}$
   ☕   Java Compiler: No warnings $\textsf{(±0)}$

Bugs

     SpotBugs: No bugs $\textsf{(±0)}$
   🐛   Error Prone: No bugs $\textsf{(±0)}$

API Problems

   🚫   Revapi: 5 warnings $\color{green}{\textsf{(+5)}}$ — low: 5

Vulnerabilities

   🛡️   OWASP Dependency Check: No vulnerabilities $\textsf{(±0)}$

Software Metrics

   🌀   Cyclomatic Complexity: 973 (total)
   💭   Cognitive Complexity: 757 (total)
   ➿   N-Path Complexity: 1545 (total)
   📏   Lines of Code: 9864 (total)
   📝   Non Commenting Source Statements: 3929 (total)
   🔗   Class Cohesion: 54.55% (maximum)
   ⚖️   Weight of Class: 100.00% (maximum)

📌 Reference Results

Delta reports computed against the reference results of 29bfd53 in workflow run 27209365117.

🚦 Quality Gates

Overall Status: ✅ SUCCESS

✅ Passed Gates

• ✅ Overall Tests Success Rate: 100.00 >= 100.00
• ✅ Line Coverage in New Code: 97.14 >= 90.00
• ✅ Branch Coverage in New Code: 93.48 >= 90.00
• ✅ Mutation Coverage in New Code: 95.35 >= 90.00
• ✅ Potential Bugs in Whole Project: 0.00 <= 0.00
• ✅ Style Violation in Whole Project: 0.00 <= 0.00

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