Schema structure refactor (#451)

* Write schema refactor spec

* Implemented schema refactor spec

trustgraph-base/trustgraph/schema/services/llm.py

@@ -0,0 +1,51 @@
+
+from pulsar.schema import Record, String, Array, Double, Integer
+
+from ..core.topic import topic
+from ..core.primitives import Error
+
+############################################################################
+
+# LLM text completion
+
+class TextCompletionRequest(Record):
+    system = String()
+    prompt = String()
+
+class TextCompletionResponse(Record):
+    error = Error()
+    response = String()
+    in_token = Integer()
+    out_token = Integer()
+    model = String()
+
+############################################################################
+
+# Embeddings
+
+class EmbeddingsRequest(Record):
+    text = String()
+
+class EmbeddingsResponse(Record):
+    error = Error()
+    vectors = Array(Array(Double()))
+
+############################################################################
+
+# Tool request/response
+
+class ToolRequest(Record):
+    name = String()
+
+    # Parameters are JSON encoded
+    parameters = String()
+
+class ToolResponse(Record):
+    error = Error()
+
+    # Plain text aka "unstructured"
+    text = String()
+
+    # JSON-encoded object aka "structured"
+    object = String()
+