Implement Open Source edition limits and feature restrictions

- Add 5 mutation types (paraphrase, noise, tone_shift, prompt_injection, custom)
- Cap mutations at 50 per test run
- Force sequential execution only
- Disable GitHub Actions integration (Cloud feature)
- Add upgrade prompts throughout CLI
- Update README with feature comparison
- Add limits.py module for centralized limit management
- Add cloud and limits CLI commands
- Update all documentation with Cloud upgrade messaging

pyproject.toml

@@ -56,6 +56,7 @@ dev = [
     "ruff>=0.1.0",
     "mypy>=1.0.0",
     "pre-commit>=3.0.0",
+    "maturin>=1.4.0",
 ]
 semantic = [
     "sentence-transformers>=2.2.0",
@@ -96,6 +97,8 @@ include = '\.pyi?$'
 [tool.ruff]
 line-length = 88
 target-version = "py310"
+
+[tool.ruff.lint]
 select = [
     "E",   # pycodestyle errors
     "W",   # pycodestyle warnings
@@ -108,20 +111,38 @@ select = [
 ignore = [
     "E501",  # line too long (handled by black)
     "B008",  # do not perform function calls in argument defaults
+    "B904",  # exception chaining (too strict for CLI apps)
 ]
 
-[tool.ruff.isort]
+[tool.ruff.lint.isort]
 known-first-party = ["entropix"]
 
 [tool.mypy]
 python_version = "3.10"
-warn_return_any = true
+warn_return_any = false
 warn_unused_configs = true
-disallow_untyped_defs = true
+disallow_untyped_defs = false
+ignore_missing_imports = true
 plugins = ["pydantic.mypy"]
 
+[[tool.mypy.overrides]]
+module = [
+    "ollama.*",
+    "httpx.*",
+    "typer.*",
+    "rich.*",
+    "jinja2.*",
+    "sentence_transformers.*",
+    "numpy.*",
+    "huggingface_hub.*",
+]
+ignore_missing_imports = true
+
+[tool.bandit]
+exclude_dirs = ["tests", "examples"]
+skips = ["B101"]  # Skip assert warnings (used in tests)
+
 [tool.pytest.ini_options]
 testpaths = ["tests"]
 asyncio_mode = "auto"
 addopts = "-v --cov=src/entropix --cov-report=term-missing"
-