Add generic memory gateway v1

memory_gateway/skills/summarize_episode_skill.py

@@ -0,0 +1,10 @@
+from .base import MemorySkill, SkillResult
+
+
+class SummarizeEpisodeSkill(MemorySkill):
+    name = "summarize_episode_skill"
+
+    async def run(self, payload: dict) -> SkillResult:
+        content = payload.get("content", "")
+        return SkillResult(status="ok", output={"summary": content[:500]})
+