feat!: migrate to OpenAI native tool calls and fix circular deps (#fuck-gemini)

- Fix circular dependencies in agent/tools
- Migrate from custom JSON to OpenAI tool calls format
- Add async streaming (step_stream, complete_stream)
- Simplify prompt system and remove token counting
- Add 5 new API endpoints (/health, /v1/models, /api/memory/*)
- Add 3 new tools (get_torrent_by_index, add_torrent_by_index, set_language)
- Fix all 500 tests and add coverage config (80% threshold)
- Add comprehensive docs (README, pytest guide)

BREAKING: LLM interface changed, memory injection via get_memory()

pyproject.toml

@@ -1,19 +1,87 @@
 [tool.poetry]
 name = "agent-media"
 version = "0.1.0"
-description = ""
+description = "AI agent for managing a local media library"
 authors = ["Francwa <francois.hodiaumont@gmail.com>"]
 readme = "README.md"
 
 [tool.poetry.dependencies]
 python = "^3.12"
-dotenv = "^0.9.9"
+python-dotenv = "^1.0.0"
 requests = "^2.32.5"
 fastapi = "^0.121.1"
 pydantic = "^2.12.4"
 uvicorn = "^0.38.0"
+pytest-xdist = "^3.8.0"
 
+[tool.poetry.group.dev.dependencies]
+pytest = "^8.0.0"
+pytest-cov = "^4.1.0"
+pytest-asyncio = "^0.23.0"
+httpx = "^0.27.0"
+ruff = "^0.14.7"
+black = "^25.11.0"
 
 [build-system]
 requires = ["poetry-core"]
 build-backend = "poetry.core.masonry.api"
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]
+python_files = ["test_*.py"]
+python_classes = ["Test*"]
+python_functions = ["test_*"]
+addopts = "-v --tb=short"
+asyncio_mode = "auto"
+
+[tool.coverage.run]
+source = ["agent", "application", "domain", "infrastructure"]
+omit = ["tests/*", "*/__pycache__/*"]
+
+[tool.coverage.report]
+exclude_lines = [
+    "pragma: no cover",
+    "def __repr__",
+    "raise NotImplementedError",
+    "if __name__ == .__main__.:",
+]
+
+[tool.black]
+line-length = 88
+target-version = ['py312']
+include = '\.pyi?$'
+exclude = '''
+/(
+    __pycache__
+  | \.git
+  | \.qodo
+  | \.vscode
+  | \.ruff_cache
+)/
+'''
+
+[tool.ruff]
+line-length = 88
+exclude = [
+    "__pycache__",
+    ".git",
+    ".ruff_cache",
+    ".qodo",
+    ".vscode",
+]
+
+[tool.ruff.lint]
+select = [
+    "E", "W",   # pycodestyle
+    "F",        # pyflakes
+    "I",        # isort
+    "B",        # flake8-bugbear
+    "C4",       # flake8-comprehensions
+    "TID",      # flake8-tidy-imports
+    "PL",       # pylint
+    "UP",       # pyupgrade
+]
+ignore = [
+    "PLR0913",  # Too many arguments
+    "PLR2004",  # Magic value comparison
+]