secureflow/feature: Add Python3 language support to sourcecode parser

[shivasurya]

Added Python parsing capabilities alongside existing Java support using tree-sitter-python. The parser now extracts classes, functions, variables, and control flow structures from .py files with full statement support (return, break, continue, assert, yield).

Changes:

• Created Python statement parsers with comprehensive test coverage
• Updated construct.go to handle both Java and Python files
• Parser auto-detects language by file extension
• All tests passing (100% success rate)

Files Changed:

• graph/python/parse_statement.go (new)
• graph/python/parse_statement_test.go (new)
• graph/construct.go (modified - 389 lines changed)
• go.mod (added tree-sitter-python dependency)

[safedep]

SafeDep Report Summary

Package Details

Package	Malware	Vulnerability	Risky License	Report

_{This report is generated by SafeDep Github App}

[codecov]

Codecov Report

❌ Patch coverage is 94.20677% with 65 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.07%. Comparing base (bd2a5ab) to head (b96a9db).
⚠️ Report is 10 commits behind head on main.

Files with missing lines	Patch %	Lines
sourcecode-parser/graph/parser_java.go	90.76%	27 Missing and 2 partials ⚠️
sourcecode-parser/graph/parser_statements.go	90.40%	17 Missing and 2 partials ⚠️
sourcecode-parser/graph/initialize.go	91.50%	7 Missing and 2 partials ⚠️
sourcecode-parser/graph/utils.go	97.15%	4 Missing and 1 partial ⚠️
sourcecode-parser/graph/parser.go	95.77%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #314      +/-   ##
==========================================
+ Coverage   72.30%   74.07%   +1.77%     
==========================================
  Files          16       22       +6     
  Lines        2473     2550      +77     
==========================================
+ Hits         1788     1889     +101     
+ Misses        641      622      -19     
+ Partials       44       39       -5     

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