Bug: reader_python misidentifies nested functions

[thseiler]

Describe the bug

When parsing Python source files, StrictDoc's Python reader incorrectly extracts nested function names as class-level method names.

To Reproduce

1. Define a class with nested methods

class Foo:
        
    def sort_by_name(people):
        def key_func(person):
            """@relation(REQ-1, scope=function)"""
            return person["name"].lower()
        return sorted(people, key=key_func)

    def sort_by_age(people):
        def key_func(person):
            """@relation(REQ-2, scope=function)"""
            return person["age"]
        return sorted(people, key=key_func)

2. complete the example to get a full StrictDoc Project:

[project]

features = [
  "REQUIREMENT_TO_SOURCE_TRACEABILITY",
  "SOURCE_FILE_LANGUAGE_PARSERS",
  "PROJECT_STATISTICS_SCREEN"
]

[DOCUMENT]
TITLE: Decorated Method Test

[REQUIREMENT]
UID: REQ-1
TITLE: Requirement Title
STATEMENT: Requirement Statement

[REQUIREMENT]
UID: REQ-2
TITLE: Requirement Title
STATEMENT: Requirement Statement

3. Run StrictDoc

strictdoc server .

the extracted name is function Foo.key_func()

Expected behavior

the extracted name should be function Foo.sort_by_name.key_func()

Screenshots

Environment

OS: Windows 11
Browser: MS Edge 136.0.3240.76
StrictDoc: 0.8.0

Additional context