🚧 Add requirements files

requirements-dev.txt

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+# Development / test dependencies for wago-modbustcp-simulator.
+# Mirrors [project.optional-dependencies].dev in pyproject.toml.
+# Includes everything from requirements.txt, plus:
+#   - pytest / pytest-asyncio: test suite
+#   - pymodbus: integration tests acting as a real Modbus TCP master
+#   - debugpy: VS Code debugging setup
+#   - httpx: ASGI test client for the FastAPI Web UI
+# Fully pinned versions for reproducible installs: requirements-lock.txt.
+-r requirements.txt
+pytest>=8.0
+pytest-asyncio>=0.23
+pymodbus>=3.6
+debugpy>=1.8
+httpx>=0.27

requirements-lock.txt

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+# Locked dependency versions for wago-modbustcp-simulator.
+# Generated 2026-10-05 from the tested .venv (Python 3.14.5, Windows).
+# Install exactly; do not edit by hand. Regenerate with:
+#   pip install -r requirements.txt
+#   pip freeze --exclude-editable > requirements-lock.txt
+# (then re-add the section comments below).
+#
+# Sections mirror pyproject.toml [project].dependencies (production) and
+# [project.optional-dependencies].dev (dev/test) — the same package set
+# pip freeze would emit, just organized for review.
+
+# --- Production (pyproject [project].dependencies) ---
+pyyaml==6.0.3
+fastapi==0.142.2
+uvicorn==0.54.0
+websockets==17.2
+    # Transitive production dependencies
+    annotated-doc==0.0.5
+    annotated-types==0.8.0
+    anyio==4.15.1
+    opentelemetry-api==1.45.0
+    click==8.5.0
+    h11==0.16.0
+    pydantic==2.13.5
+        pydantic-core==2.46.5
+    starlette==1.7.0
+    typing-extensions==4.16.0
+    typing-inspection==0.4.4
+    # anyio (required unconditionally by starlette) pulls idna
+    idna==3.20
+
+# --- Dev / test (pyproject [project.optional-dependencies].dev) ---
+pytest==9.1.1
+pytest-asyncio==1.4.0
+pymodbus==3.15.0
+debugpy==1.8.22
+httpx==0.28.1
+    # Transitive dev/test dependencies
+    certifi==2026.7.22
+        httpcore==1.0.9
+    iniconfig==2.3.0
+    packaging==26.3
+    pluggy==1.6.0
+    pygments==2.21.0
+    colorama==0.4.6; sys_platform == "win32"  # pytest dep on Windows only

requirements.txt

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+# Production runtime dependencies for wago-modbustcp-simulator.
+# Mirrors [project].dependencies in pyproject.toml — the set that
+# `pip install .` (and the Docker image) actually needs:
+#   - PyYAML: node config / scenario DSL files
+#   - fastapi + uvicorn + websockets: optional Web UI (serve --web)
+# Development and test dependencies live in requirements-dev.txt.
+# Fully pinned versions for reproducible installs: requirements-lock.txt.
+PyYAML>=6.0
+fastapi>=0.110
+uvicorn>=0.29
+websockets>=12.0