chore: add mise environment for Python 3.14

Pin Python 3.14 and uv, auto-create .venv, and expose install/test/validate/download tasks.

.python-version

@@ -0,0 +1 @@
+3.14

HANDOFF.md

@@ -94,12 +94,13 @@ In 03: AsylbLG, Unterbringung, Nettofiscal.
 
 ```bash
 cd /Volumes/SSD2TB/work/migranten
-source .venv/bin/activate   # oder: python3 -m venv .venv && pip install -r requirements.txt
-python -m pytest tests -v
-python scripts/validate_kb.py
-python scripts/ingest/download_manifest.py --dry-run
+mise install                 # Python 3.14, uv, .venv, requirements.txt
+mise run check               # Tests + Validator
+mise run download            # Manifest-Dry-Run
 ```
 
+Ohne mise: `source .venv/bin/activate` bzw. `python3 -m venv .venv && pip install -r requirements.txt`, dann `python -m pytest tests -v` / `python scripts/validate_kb.py`.
+
 Abhängigkeiten: pydantic, pyyaml, pytest, httpx, python-frontmatter, openpyxl, pdfplumber.
 
 ---

README.md

@@ -38,6 +38,17 @@ Faktenbasierte, hierarchische Knowledgebase. Jede Zahlenaussage trägt Quelle un
 
 ## Werkzeuge
 
+Runtime und Tasks steuert [mise](https://mise.jdx.dev/) (`mise.toml`). Einmalig im Repo-Root:
+
+```bash
+mise install          # Python 3.14, uv, .venv, requirements.txt
+mise run check        # Tests + Validator
+```
+
+Weitere Tasks: `mise run test`, `mise run validate`, `mise run download` (Dry-Run), `mise run download-raw`.
+
+Ohne mise:
+
 ```bash
 python -m venv .venv
 source .venv/bin/activate

mise.toml

@@ -0,0 +1,49 @@
+min_version = "2024.9.5"
+
+[tools]
+python = "3.14"
+uv = "0.11"
+
+[env]
+PROJECT_NAME = "{{ config_root | basename }}"
+# Repo liegt auf einem anderen Volume als der uv-Cache → Copy statt Hardlink
+UV_LINK_MODE = "copy"
+# Virtualenv automatisch anlegen und beim Betreten des Projektordners aktivieren
+_.python.venv = { path = ".venv", create = true }
+
+[hooks]
+postinstall = "mise run install"
+
+[tasks.install]
+description = "Python-Abhängigkeiten aus requirements.txt installieren"
+alias = "i"
+run = """
+if command -v uv >/dev/null 2>&1; then
+  uv pip install -r requirements.txt
+else
+  python -m ensurepip --upgrade 2>/dev/null || true
+  python -m pip install -r requirements.txt
+fi
+"""
+
+[tasks.test]
+description = "pytest-Suite"
+alias = "t"
+run = "python -m pytest tests -v"
+
+[tasks.validate]
+description = "KB-Frontmatter, Series, Quellen und ID-Refs prüfen"
+alias = "v"
+run = "python scripts/validate_kb.py"
+
+[tasks.download]
+description = "Rohdateien aus raw/MANIFEST.yaml prüfen (Dry-Run)"
+run = "python scripts/ingest/download_manifest.py --dry-run"
+
+[tasks.download-raw]
+description = "Rohdateien aus raw/MANIFEST.yaml nach raw/ laden"
+run = "python scripts/ingest/download_manifest.py"
+
+[tasks.check]
+description = "Tests + KB-Validator"
+depends = ["test", "validate"]