Fix Anthropic skill references and backend git support

backend/Dockerfile

@@ -1,4 +1,5 @@
 FROM python:3.12-slim
+RUN apt-get update && apt-get install -y git && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /app
 

backend/services/llm/anthropic_provider.py

@@ -269,7 +269,10 @@ class AnthropicProvider(LLMProvider):
         runs ``validate.py`` server-side via code_execution, and voluntarily
         calls ``output_tool`` once it has well-formed data.
         """
-        try:\n            skill_id, version = settings.get_skill(skill_name)\n        except Exception:\n            skill_id, version = None, None
+        try:
+            skill_id, version = settings.get_skill(skill_name)
+        except Exception:
+            skill_id, version = None, None
 
         # Build initial user content
         user_content: list[dict] = []

backend/skills_manifest.json

@@ -1,18 +1,18 @@
 {
   "default_model_version": "1.4.0",
   "extract-pintable": {
-    "skill_id": "skill_013cTQFk8bqwJVemreNihQRW",
-    "latest_version": "1777167199421424",
+    "skill_id": "skill_01VMWPZuvuZAe4LmLbmsNWNY",
+    "latest_version": "1784798970179642",
     "display_title": "Extract Pin Table"
   },
   "extract-pattern": {
-    "skill_id": "skill_0195iVb55HeQgKHFkePC56hP",
-    "latest_version": "1777167200857394",
+    "skill_id": "skill_01JuA5xdSJsz2V4dcwzpTRpe",
+    "latest_version": "1784798971057751",
     "display_title": "Extract Passive Pattern"
   },
   "extract-specs": {
-    "skill_id": "skill_016sqcgvuVea95Nb4uJYBj7h",
-    "latest_version": "1777167202182784",
+    "skill_id": "skill_01NHZY6K3tvdbAzBo7eGT8qD",
+    "latest_version": "1784798971971891",
     "display_title": "Extract Component Specs"
   }
 }