[backend] refactor(contract-types): extract ContractOutputType business logic into handler classes (#4302)

[savacano28]

Proposed changes

Chunk 1: Part 1

• Cleaned up the ContractOutputType enum by moving all business logic into separate handler classes.
• Created handler classes for each output type (Text, Number, Port, PortScan, IPv4, IPv6, Credentials, CVE, Asset)
• Services now fetch handlers from a factory instead of calling enum functions

Testing Instructions

Test refact_2026-02-18T08_40_12.089231500Z_(with_teams & with_players & with_variable_values).zip

1. Atomic Testing with Payload and Output Parsers
   You should be able to execute an atomic test using a payload with output parsers configured.
   The test should work as expected, with normal execution behavior.

2. Inject Execution with Nuclei
   You should be able to execute an inject operation Nuclei.
   The execution should complete successfully and produce:

• Findings (including CVEs, if applicable)
• Execution traces
• No unexpected errors

3. Atomic Testing with Vulnerability Expectation (CVE Validation)
   You should be able to execute an atomic test with a defined vulnerability expectation.
   If the payload uses an output parser of type cve, the system should correctly validate the vulnerability expectation against the detected CVE.

Related issues

• Related Shodan Injector add asset-creation option #4302

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality
• For bug fix -> I implemented a test that covers the bug

Further comments

If this is a relatively large or complex change, kick off the discussion by explaining why you chose the solution you did and what alternatives you considered, etc...

[codecov]

Codecov Report

❌ Patch coverage is 79.52756% with 26 lines in your changes missing coverage. Please review.
✅ Project coverage is 56.23%. Comparing base (a9f6deb) to head (fffbd18).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...n/java/io/openaev/rest/finding/FindingService.java	56.52%	6 Missing and 4 partials ⚠️
...naev/output_processor/AbstractOutputProcessor.java	81.25%	5 Missing and 1 partial ⚠️
...enaev/output_processor/OutputProcessorFactory.java	75.00%	2 Missing ⚠️
...o/openaev/output_processor/CVEOutputProcessor.java	93.33%	0 Missing and 1 partial ⚠️
.../openaev/output_processor/IPv4OutputProcessor.java	80.00%	1 Missing ⚠️
.../openaev/output_processor/IPv6OutputProcessor.java	80.00%	1 Missing ⚠️
...penaev/output_processor/NumberOutputProcessor.java	66.66%	1 Missing ⚠️
.../openaev/output_processor/PortOutputProcessor.java	66.66%	1 Missing ⚠️
...naev/output_processor/PortScanOutputProcessor.java	91.66%	0 Missing and 1 partial ⚠️
.../openaev/output_processor/TextOutputProcessor.java	66.66%	1 Missing ⚠️
... and 1 more

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #4960      +/-   ##
============================================
+ Coverage     56.03%   56.23%   +0.20%     
- Complexity     4441     4492      +51     
============================================
  Files           986      997      +11     
  Lines         29261    29357      +96     
  Branches       2142     2147       +5     
============================================
+ Hits          16396    16510     +114     
+ Misses        11920    11896      -24     
- Partials        945      951       +6     

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[heditar]

Tested all output handlers