feat: migrate to Poetry and implement multi-backend DNS management ✨

- Migrated from setuptools to Poetry; added pyproject.toml, poetry.lock,
  poetry.toml and .python-version (Python 3.11.12)
- Built out full directdnsonly Python package with BIND and CoreDNS MySQL
  backends, CherryPy REST API, persist-queue worker, and vyper-based config
- Auth credentials now read from config/env (app.auth_username/password)
  rather than hardcoded; override via DADNS_APP_AUTH_PASSWORD env var
- Added Dockerfile.deepseek: Python 3.11 slim + BIND9 + Poetry install
- Rewrote docker-compose.yml for local dev stack (MySQL + dadns services)
- Added SQL schema, docker/ BIND configs, justfile, tests, and README
- Expanded .gitignore for Poetry/Python project artifacts

pyproject.toml

@@ -0,0 +1,34 @@
+[project]
+name = "directdnsonly"
+version = "1.0.9"
+description = "DNS Management System - DirectAdmin to multiple backends"
+authors = [
+    {name = "Aaron Guise",email = "aaron@guise.net.nz"}
+]
+license = {text = "MIT"}
+readme = "README.md"
+requires-python = ">=3.11,<3.14"
+dependencies = [
+    "vyper-config (>=1.2.1,<2.0.0)",
+    "loguru (>=0.7.3,<0.8.0)",
+    "persist-queue (>=1.0.0,<2.0.0)",
+    "cherrypy (>=18.10.0,<19.0.0)",
+    "sqlalchemy (<2.0.0)",
+    "pymysql (>=1.1.1,<2.0.0)",
+    "dnspython (>=2.7.0,<3.0.0)",
+    "pyyaml (>=6.0.2,<7.0.0)",
+]
+
+[tool.poetry]
+package-mode = true
+
+[tool.poetry.group.dev.dependencies]
+black = "^25.1.0"
+pyinstaller = "^6.13.0"
+pytest = "^8.3.5"
+pytest-cov = "^6.1.1"
+pytest-mock = "^3.14.0"
+
+[build-system]
+requires = ["poetry-core>=2.0.0,<3.0.0"]
+build-backend = "poetry.core.masonry.api"