test: add comprehensive integration tests and CI pipeline validation …

[honeydew78]

…for dependency impact analysis

[github-actions]

🛡️ Diff-Guard Architectural Risk Report

PR: #0 | Status: 🟡 MEDIUM RISK | Risk Score: 20/100

🔍 Modified Semantic Entities

File	Entity	Change Type
app.py	analyze_diff_and_report()	MODIFIED
app.py	format_markdown_report()	MODIFIED
app.py	parse_github_url()	MODIFIED
app.py	api_get_branches()	MODIFIED
app.py	api_get_commits()	MODIFIED
app.py	api_analyze()	MODIFIED
app.py	_cached_fetch()	ADDED
app.py	compute_risk_score()	ADDED
app.py	_build_summary_text()	ADDED
app.py	run_analysis_pipeline()	ADDED
app.py	api_health()	ADDED
tests/test_api.py	test_health_endpoint()	ADDED
tests/test_graph_engine.py	test_shortest_path_finding()	ADDED
tests/test_graph_engine.py	test_find_functions_using_symbol_via_graph()	ADDED
tests/test_parser.py	_get_changed_line_numbers()	ADDED
tests/test_parser.py	_run_sandbox_analysis()	ADDED
tests/test_parser.py	test_sandbox_modified_file_detection()	ADDED
tests/test_parser.py	test_sandbox_compute_value_modified()	ADDED
tests/test_parser.py	test_sandbox_blast_radius()	ADDED
tests/test_parser.py	test_sandbox_impact_path()	ADDED
tests/test_parser.py	test_sandbox_at_risk_function()	ADDED

🕸️ Architectural Blast Radius

⚠️ 2 downstream files are directly or transitively affected:

Modified File	Impacted Downstream Files (Dependency Path)
app.py	app.py ➔ tests/test_api.py
app.py	app.py ➔ cli.py
tests/test_api.py	None (Terminal module)
tests/test_graph_engine.py	None (Terminal module)
tests/test_parser.py	None (Terminal module)

🔍 Downstream Functions at Risk

The following specific functions in direct consumer files rely on the modified symbols and may be at risk:

Consumer File	At-Risk Functions
cli.py	run_analysis()