feat: init_jupyter_analysis v1.1.0 — soporte --project, --desc, --tags

Nueva funcion write_analysis_md_bash_infra genera analysis.md con frontmatter.
El pipeline ahora acepta --project para crear analisis directamente en
projects/{proyecto}/analysis/{nombre}/, valida que el proyecto exista,
genera analysis.md con dir_path correcto y ejecuta fn index al final.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

python/functions/notebook/jupyter_write.py

@@ -36,12 +36,16 @@ def _resolve_collab_username(server_url: str, token: str) -> str:
 
 
 def _notebook_exists(notebook_path: str, server_url: str, token: str) -> bool:
-    """Comprueba si un notebook existe en el servidor Jupyter via HEAD /api/contents."""
+    """Comprueba si un notebook existe en el servidor Jupyter via GET /api/contents.
+
+    Usa GET con ?content=0 (metadata only). HEAD no es soportado universalmente
+    (Jupyter 4.x devuelve 405 Method Not Allowed en /api/contents/{path}).
+    """
     headers = {"Accept": "application/json"}
     if token:
         headers["Authorization"] = f"token {token}"
-    check_url = f"{server_url}/api/contents/{notebook_path}"
-    req = Request(check_url, headers=headers, method="HEAD")
+    check_url = f"{server_url}/api/contents/{notebook_path}?content=0"
+    req = Request(check_url, headers=headers, method="GET")
     try:
         with urlopen(req, timeout=5):
             return True
@@ -340,9 +344,9 @@ def jupyter_create_notebook(
     if token:
         headers["Authorization"] = f"token {token}"
 
-    # Verificar si ya existe (HEAD request)
+    # Verificar si ya existe (GET con content=0; HEAD no esta soportado en Jupyter 4.x)
     check_url = f"{server_url}/api/contents/{notebook_path}"
-    check_req = Request(check_url, headers=headers, method="HEAD")
+    check_req = Request(f"{check_url}?content=0", headers=headers, method="GET")
     already_exists = False
     try:
         with urlopen(check_req, timeout=5):