[Cleanup] analyzer_version field is stale dead metadata

[timenick]

Context

AnalysisOutput.analyzer_version is a string field embedded in the JSON
output of winml analyze. It exists for schema/provenance — letting
downstream tools (diff utilities, CI baselines, archived reports) know
which analyzer version produced a given JSON.

Problem

The field is stale dead metadata:

• Defined as a hardcoded default analyzer_version: str = "0.1.0" in
  OutputAggregator.__init__ (src/winml/modelkit/analyze/core/output_aggregator.py:46)
• Has not been bumped since the analyzer was first written
• Does not correspond to the PyPI package version (winml-modelkit is at 0.0.2)
• Originally read from analyze/__init__.py:__version__, which was removed
  in Rename ModelKit -> WinML CLI across user-visible surface (Wave 1) #587 — no one maintains it

Result: every analysis output JSON has "analyzer_version": "0.1.0"
regardless of actual analyzer code state. The field carries zero information.

Fix: remove the field

• src/winml/modelkit/analyze/models/output.py — drop analyzer_version field from AnalysisOutput
• src/winml/modelkit/analyze/core/output_aggregator.py — drop analyzer_version param from OutputAggregator.__init__ and from the AnalysisOutput(...) construction
• Update tests that pass or assert analyzer_version:
  • tests/unit/analyze/core/test_output_aggregator.py (~8 occurrences)
  • tests/unit/analyze/models/test_output.py (~9 occurrences)
  • tests/unit/analyze/test_analyzer.py (~6 occurrences)
  • tests/unit/analyze/test_analyze_onnx.py (1)
  • tests/unit/analyze/test_static_analyzer_cli.py (3)
• Update mock data: tests/mock_data/analyze/output.json