feat(org): add LiteLLM usage stats to organization dashboard

Replace mock token usage with real data from LiteLLM free-tier APIs
(global/activity, global/activity/model, global/spend/models). Adds
per-model breakdown table, loading/error states, usage data models
with serde tests, and i18n keys for all five languages.

Also includes: replace Ollama with LiteLLM proxy, update config,
docker-compose, and provider infrastructure.

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

assets/i18n/de.json

@@ -144,6 +144,16 @@
     "email_address": "E-Mail-Adresse",
     "email_placeholder": "kollege@firma.de",
     "send_invite": "Einladung senden",
+    "total_spend": "Gesamtausgaben",
+    "total_tokens": "Tokens gesamt",
+    "model_usage": "Nutzung nach Modell",
+    "model": "Modell",
+    "tokens": "Tokens",
+    "spend": "Ausgaben",
+    "usage_unavailable": "Nutzungsdaten nicht verfuegbar",
+    "loading_usage": "Nutzungsdaten werden geladen...",
+    "prompt_tokens": "Prompt-Tokens",
+    "completion_tokens": "Antwort-Tokens",
     "pricing_title": "Preise",
     "pricing_subtitle": "Waehlen Sie den passenden Plan fuer Ihre Organisation"
   },

assets/i18n/en.json

@@ -144,6 +144,16 @@
     "email_address": "Email Address",
     "email_placeholder": "colleague@company.com",
     "send_invite": "Send Invite",
+    "total_spend": "Total Spend",
+    "total_tokens": "Total Tokens",
+    "model_usage": "Usage by Model",
+    "model": "Model",
+    "tokens": "Tokens",
+    "spend": "Spend",
+    "usage_unavailable": "Usage data unavailable",
+    "loading_usage": "Loading usage data...",
+    "prompt_tokens": "Prompt Tokens",
+    "completion_tokens": "Completion Tokens",
     "pricing_title": "Pricing",
     "pricing_subtitle": "Choose the plan that fits your organization"
   },

assets/i18n/es.json

@@ -144,6 +144,16 @@
     "email_address": "Direccion de correo electronico",
     "email_placeholder": "colega@empresa.com",
     "send_invite": "Enviar invitacion",
+    "total_spend": "Gasto total",
+    "total_tokens": "Tokens totales",
+    "model_usage": "Uso por modelo",
+    "model": "Modelo",
+    "tokens": "Tokens",
+    "spend": "Gasto",
+    "usage_unavailable": "Datos de uso no disponibles",
+    "loading_usage": "Cargando datos de uso...",
+    "prompt_tokens": "Tokens de entrada",
+    "completion_tokens": "Tokens de respuesta",
     "pricing_title": "Precios",
     "pricing_subtitle": "Elija el plan que se adapte a su organizacion"
   },

assets/i18n/fr.json

@@ -144,6 +144,16 @@
     "email_address": "Adresse e-mail",
     "email_placeholder": "collegue@entreprise.com",
     "send_invite": "Envoyer l'invitation",
+    "total_spend": "Depenses totales",
+    "total_tokens": "Tokens totaux",
+    "model_usage": "Utilisation par modele",
+    "model": "Modele",
+    "tokens": "Tokens",
+    "spend": "Depenses",
+    "usage_unavailable": "Donnees d'utilisation indisponibles",
+    "loading_usage": "Chargement des donnees d'utilisation...",
+    "prompt_tokens": "Tokens d'entree",
+    "completion_tokens": "Tokens de reponse",
     "pricing_title": "Tarifs",
     "pricing_subtitle": "Choisissez le plan adapte a votre organisation"
   },

assets/i18n/pt.json

@@ -144,6 +144,16 @@
     "email_address": "Endereco de Email",
     "email_placeholder": "colleague@company.com",
     "send_invite": "Enviar Convite",
+    "total_spend": "Gasto total",
+    "total_tokens": "Tokens totais",
+    "model_usage": "Uso por modelo",
+    "model": "Modelo",
+    "tokens": "Tokens",
+    "spend": "Gasto",
+    "usage_unavailable": "Dados de uso indisponiveis",
+    "loading_usage": "Carregando dados de uso...",
+    "prompt_tokens": "Tokens de entrada",
+    "completion_tokens": "Tokens de resposta",
     "pricing_title": "Precos",
     "pricing_subtitle": "Escolha o plano adequado a sua organizacao"
   },