fix: switch Big Pickle -> DeepSeek V4 Flash (censorship)

- Big Pickle (opencode/zen free) censura contenuti fantasy
  con "User Safety: safe" - blocca la narrazione del DM
- DeepSeek V4 Flash su opencode/go: $0.14/M token,
  nessuna censura, descrizioni fantasy corrette
- Aggiornati .env, start.sh, config.py

src/engine/config.py

@@ -15,9 +15,9 @@ class ProviderConfig:
     openrouter_model: str = "openrouter/free"
     openrouter_key_env: str = "DCC_OPENROUTER_KEY"
     openrouter_free_fallback: bool = True
-    local_base_url: str = "https://opencode.ai/zen/v1"
+    local_base_url: str = "https://opencode.ai/zen/go/v1"
     local_api_key: str = ""
-    local_model: str = "big-pickle"
+    local_model: str = "deepseek-v4-flash"
     timeout: int = 120
 
 

start.sh

@@ -16,9 +16,9 @@ export DCC_OPENROUTER_KEY="${DCC_OPENROUTER_KEY:-}"
 export DCC_OPENROUTER_MODEL="${DCC_OPENROUTER_MODEL:-openrouter/free}"
 export DCC_OLLAMA_URL="${DCC_OLLAMA_URL:-http://192.168.0.50:11434}"
 export DCC_OLLAMA_MODEL="${DCC_OLLAMA_MODEL:-gemma2:9b}"
-export DCC_LOCAL_URL="${DCC_LOCAL_URL:-https://opencode.ai/zen/v1}"
+export DCC_LOCAL_URL="${DCC_LOCAL_URL:-https://opencode.ai/zen/go/v1}"
 export DCC_LOCAL_KEY="${DCC_LOCAL_KEY:-}"
-export DCC_LOCAL_MODEL="${DCC_LOCAL_MODEL:-big-pickle}"
+export DCC_LOCAL_MODEL="${DCC_LOCAL_MODEL:-deepseek-v4-flash}"
 
 # ── create data dir ────────────────────────────────────────────────
 mkdir -p data