fix: revision completa de rutas Docker, logica SQL y configuracion

Backend Go:
- backend/cmd/server/main.go: ruta wiki_images configurable via WIKI_IMAGES_PATH
- backend/cmd/wiki_worker/main.go: default /opt/rss2 en lugar de /app, leer env
- workers/ctranslator_worker.py: default CT2_MODEL_PATH /opt/rss2 en lugar de /app
- workers/llm_categorizer_worker.py: default LLM_MODEL_PATH /opt/rss2
- workers/{langdetect,simple_translator,translation_scheduler}.py: DB_HOST default 'localhost' en lugar de 'db' (hostname Docker)

SQL / esquema:
- poc/seed.sql: corregir logica de auto-traducciones ES (id LIKE md5() era incorrecto)
- init-db/06-tags.sql: eliminar columna wiki_checked duplicada

Documentacion y configuracion:
- docs/DEPLOY_DEBIAN.md: usar ct2-transformers-converter (lo que usa el worker real)
- deploy/debian/env.example: agregar WIKI_IMAGES_PATH
- deploy/debian/systemd/rss2-cluster.service: agregar HF_HOME faltante
- deploy/debian/install.sh: comparacion numerica correcta de version Go
- scripts/generate_secure_credentials.sh: ruta CT2_MODEL_PATH corregida
- frontend/nginx.conf: advertencia de que es configuracion Docker legacy
- docs/QUICKSTART_LLM.md: nota de deprecacion Docker
- README.md: renombrar backend-go a backend en diagrama

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

deploy/debian/install.sh

@@ -33,7 +33,17 @@ apt-get install -y --no-install-recommends \
     libpq-dev
 
 # Go (rss-ingestor-go requiere Go 1.25)
-if ! command -v go &>/dev/null || [[ "$(go version | awk '{print $3}' | tr -d 'go')" < "1.25" ]]; then
+_need_go=false
+if ! command -v go &>/dev/null; then
+    _need_go=true
+else
+    _gover=$(go version | awk '{print $3}' | tr -d 'go')
+    IFS='.' read -ra _gv <<< "$_gover"
+    if [[ "${_gv[0]:-0}" -lt 1 ]] || [[ "${_gv[0]:-0}" -eq 1 && "${_gv[1]:-0}" -lt 25 ]]; then
+        _need_go=true
+    fi
+fi
+if [[ "$_need_go" == "true" ]]; then
     info "Instalando Go 1.25..."
     GO_VERSION="1.25.0"
     ARCH=$(dpkg --print-architecture)