fix: remove unused assignment and import warnings in tests

docs/arch/ascii/module.txt

@@ -0,0 +1,144 @@
+╔══════════════════════════════════════╗
+║         Architecture Overview        ║
+╠══════════════════════════════════════╣
+║  Elements: 61     Modules: 4       ║
+║  Relationships: 59                  ║
+╚══════════════════════════════════════╝
+
+┌─ Adapters (30 types)
+│
+│  ├── [str] AsciiRenderer
+│  ├── [str] D2Renderer
+│  ├── [str] CargoWorkspaceAnalyzer
+│  ├── [str] WorkspaceToml
+│  ├── [str] WorkspaceSection
+│  ├── [str] MemberToml
+│  ├── [str] PackageSection
+│  ├── [str] PythonProjectAnalyzer
+│  ├── [str] ProjectSection
+│  ├── [str] PoetrySection
+│  ├── [str] ToolSection
+│  ├── [str] PyprojectToml
+│  ├── [str] StdoutOutputWriter
+│  ├── [str] FileOutputWriter
+│  ├── [enm] OutputPath
+│  ├── [str] MermaidRenderer
+│  ├── [trt] LanguageExtractor
+│  ├── [str] TreeSitterAnalyzer
+│  ├── [str] RustExtractor
+│  ├── [str] PythonExtractor
+│  ├── [str] WalkdirDiscovery
+│  ├── [str] HtmlRenderer
+│  ├── [str] GraphData
+│  ├── [str] NodeData
+│  ├── [str] EdgeData
+│  ├── [str] RawRules
+│  ├── [str] RawConfig
+│  ├── [str] RawAnalysis
+│  ├── [str] RawOutput
+│  └── [str] TomlConfigLoader
+└───
+
+┌─ Application (2 types)
+│
+│  ├── [str] AnalyzeCodebase
+│  └── [str] AnalyzeCodebaseResult
+└───
+
+┌─ Domain (27 types)
+│
+│  ├── [str] Relationship
+│  ├── [str] CodeElement
+│  ├── [enm] DomainError
+│  ├── [trt] DiagramRenderer
+│  ├── [trt] SourceAnalyzer
+│  ├── [trt] ConfigLoader
+│  ├── [trt] FileDiscovery
+│  ├── [trt] ProjectAnalyzer
+│  ├── [trt] OutputWriter
+│  ├── [str] AnalysisResult
+│  ├── [str] AnalysisConfig
+│  ├── [str] AnalysisWarning
+│  ├── [enm] CodeElementKind
+│  ├── [enm] RelationshipKind
+│  ├── [enm] Visibility
+│  ├── [enm] DiagramLevel
+│  ├── [str] OutputConfig
+│  ├── [str] RenderedFile
+│  ├── [str] RenderOutput
+│  ├── [str] ModuleName
+│  ├── [enm] Language
+│  ├── [str] SourceFile
+│  ├── [str] FilePath
+│  ├── [enm] RuleKind
+│  ├── [str] RuleViolation
+│  ├── [str] BoundaryRule
+│  └── [str] CodeGraph
+└───
+
+┌─ Presentation (2 types)
+│
+│  ├── [str] Cli
+│  └── [enm] Command
+└───
+
+── Relationships ──
+  Adapters::AsciiRenderer ─[extends]─> Domain::DiagramRenderer
+  Adapters::D2Renderer ─[has]─> Domain::DiagramLevel
+  Adapters::D2Renderer ─[extends]─> Domain::DiagramRenderer
+  Adapters::CargoWorkspaceAnalyzer ─[extends]─> Domain::ProjectAnalyzer
+  Adapters::ToolSection ─[has]─> Adapters::PoetrySection
+  Adapters::PyprojectToml ─[has]─> Adapters::ToolSection
+  Adapters::PythonProjectAnalyzer ─[extends]─> Domain::ProjectAnalyzer
+  Adapters::StdoutOutputWriter ─[extends]─> Domain::OutputWriter
+  Adapters::FileOutputWriter ─[has]─> Adapters::OutputPath
+  Adapters::FileOutputWriter ─[extends]─> Domain::OutputWriter
+  Adapters::MermaidRenderer ─[has]─> Domain::DiagramLevel
+  Adapters::MermaidRenderer ─[extends]─> Domain::DiagramRenderer
+  Adapters::TreeSitterAnalyzer ─[has]─> Adapters::RustExtractor
+  Adapters::TreeSitterAnalyzer ─[has]─> Adapters::PythonExtractor
+  Adapters::TreeSitterAnalyzer ─[extends]─> Domain::SourceAnalyzer
+  Adapters::RustExtractor ─[extends]─> Adapters::LanguageExtractor
+  Adapters::PythonExtractor ─[extends]─> Adapters::LanguageExtractor
+  Adapters::WalkdirDiscovery ─[extends]─> Domain::FileDiscovery
+  Adapters::HtmlRenderer ─[extends]─> Domain::DiagramRenderer
+  Adapters::RawConfig ─[has]─> Adapters::RawAnalysis
+  Adapters::RawConfig ─[has]─> Adapters::RawOutput
+  Adapters::RawConfig ─[has]─> Adapters::RawRules
+  Adapters::TomlConfigLoader ─[has]─> Adapters::RawConfig
+  Adapters::TomlConfigLoader ─[extends]─> Domain::ConfigLoader
+  Application::AnalyzeCodebaseResult ─[has]─> Domain::CodeGraph
+  Domain::Relationship ─[has]─> Domain::RelationshipKind
+  Domain::CodeElement ─[has]─> Domain::CodeElementKind
+  Domain::CodeElement ─[has]─> Domain::FilePath
+  Domain::CodeElement ─[has]─> Domain::Visibility
+  Domain::AnalysisConfig ─[has]─> Domain::DiagramLevel
+  Domain::AnalysisWarning ─[has]─> Domain::FilePath
+  Domain::SourceFile ─[has]─> Domain::FilePath
+  Domain::SourceFile ─[has]─> Domain::Language
+  Domain::RuleViolation ─[has]─> Domain::RuleKind
+  Application ─[has]─> Domain
+  Presentation ─[has]─> Adapters
+  Presentation ─[has]─> Adapters
+  Presentation ─[has]─> Adapters
+  Presentation ─[has]─> Adapters
+  Presentation ─[has]─> Domain
+  Presentation ─[has]─> Adapters
+  Presentation ─[has]─> Adapters
+  Presentation ─[has]─> Adapters
+  Presentation ─[has]─> Adapters
+  Presentation ─[has]─> Adapters
+  Presentation ─[has]─> Adapters
+  Presentation ─[has]─> Application
+  Presentation ─[has]─> Adapters
+  Adapters ─[has]─> Domain
+  Adapters ─[has]─> Domain
+  Adapters ─[has]─> Domain
+  Adapters ─[has]─> Domain
+  Adapters ─[has]─> Domain
+  Adapters ─[has]─> Domain
+  Adapters ─[has]─> Domain
+  Adapters ─[has]─> Domain
+  Adapters ─[has]─> Domain
+  Adapters ─[has]─> Domain
+  Adapters ─[has]─> Domain