Fix pyright type errors across codebase

- Add pyrightconfig.json for pyright 1.1.408 TOML parsing workaround
- Add NoReturn annotations to fatal() functions for proper type narrowing
- Add None checks and assertions after require=True get_record() calls
- Fix AttrDict class with __getattr__ for dynamic attribute access
- Add type annotations and casts for Kubernetes client objects
- Store compose config as DockerDeployer instance attributes
- Filter None values from dotenv and environment mappings
- Use hasattr/getattr patterns for optional container attributes

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

pyproject.toml

@@ -71,14 +71,6 @@ typeCheckingMode = "basic"
 reportMissingImports = "none"
 reportMissingModuleSource = "none"
 reportUnusedImport = "error"
-# Disable common issues in existing codebase - can be enabled incrementally
-reportGeneralTypeIssues = "none"
-reportOptionalMemberAccess = "none"
-reportOptionalSubscript = "none"
-reportOptionalCall = "none"
-reportOptionalIterable = "none"
-reportUnboundVariable = "warning"
-reportUnusedExpression = "none"
 include = ["stack_orchestrator/**/*.py", "tests/**/*.py"]
 exclude = ["**/build/**", "**/__pycache__/**"]