Adapt Pinscope to DeepSeek, auto datasheets, and a shared library.

Based on manvalan/pinscope main. Default LLM is DeepSeek with local
skills and PDF ingest. Datasheets are fetched from LCSC/TI, stored in
the component library, and review extracts abs-max with a deeper
checklist. Adds scripts/update-pinscope.sh for the production host.

backend/services/llm/anthropic_provider.py

@@ -274,6 +274,18 @@ class AnthropicProvider(LLMProvider):
         except Exception:
             skill_id, version = None, None
 
+        if not skill_id:
+            from backend.services.llm.local_skill import run_skill_locally
+            return await run_skill_locally(
+                self,
+                skill_name=skill_name,
+                model=model,
+                system=system,
+                user_text=user_text,
+                pdf_path=pdf_path,
+                output_tool=output_tool,
+            )
+
         # Build initial user content
         user_content: list[dict] = []
         if pdf_path: