Structured data 2 (#645)

* Structured data refactor - multi-index tables, remove need for manual mods to the Cassandra tables

* Tech spec updated to track implementation

specs/api/paths/flow/nlp-query.yaml

@@ -34,7 +34,7 @@ post:
     ```
     1. User asks: "Who does Alice know?"
     2. NLP Query generates GraphQL
-    3. Execute via /api/v1/flow/{flow}/service/objects
+    3. Execute via /api/v1/flow/{flow}/service/rows
     4. Return results to user
     ```
 

specs/api/paths/flow/rows.yaml

@@ -1,19 +1,19 @@
 post:
   tags:
     - Flow Services
-  summary: Objects query - GraphQL over knowledge graph
+  summary: Rows query - GraphQL over structured data
   description: |
-    Query knowledge graph using GraphQL for object-oriented data access.
+    Query structured data using GraphQL for row-oriented data access.
 
-    ## Objects Query Overview
+    ## Rows Query Overview
 
-    GraphQL interface to knowledge graph:
+    GraphQL interface to structured data:
     - **Schema-driven**: Predefined types and relationships
     - **Flexible queries**: Request exactly what you need
     - **Nested data**: Traverse relationships in single query
     - **Type-safe**: Strong typing with introspection
 
-    Abstracts RDF triples into familiar object model.
+    Abstracts structured rows into familiar object model.
 
     ## GraphQL Benefits
 
@@ -61,7 +61,7 @@ post:
     Schema defines available types via config service.
     Use introspection query to discover schema.
 
-  operationId: objectsQueryService
+  operationId: rowsQueryService
   security:
     - bearerAuth: []
   parameters:
@@ -77,7 +77,7 @@ post:
     content:
       application/json:
         schema:
-          $ref: '../../components/schemas/query/ObjectsQueryRequest.yaml'
+          $ref: '../../components/schemas/query/RowsQueryRequest.yaml'
         examples:
           simpleQuery:
             summary: Simple query
@@ -129,7 +129,7 @@ post:
       content:
         application/json:
           schema:
-            $ref: '../../components/schemas/query/ObjectsQueryResponse.yaml'
+            $ref: '../../components/schemas/query/RowsQueryResponse.yaml'
           examples:
             successfulQuery:
               summary: Successful query

specs/api/paths/flow/structured-query.yaml

@@ -9,7 +9,7 @@ post:
 
     Combines two operations in one call:
     1. **NLP Query**: Generate GraphQL from question
-    2. **Objects Query**: Execute generated query
+    2. **Rows Query**: Execute generated query
     3. **Return Results**: Direct answer data
 
     Simplest way to query knowledge graph with natural language.
@@ -21,7 +21,7 @@ post:
     - **Output**: Query results (data)
     - **Use when**: Want simple, direct answers
 
-    ### NLP Query + Objects Query (separate calls)
+    ### NLP Query + Rows Query (separate calls)
     - **Step 1**: Convert question → GraphQL
     - **Step 2**: Execute GraphQL → results
     - **Use when**: Need to inspect/modify query before execution