Add analytical store schema POC (#164)

* add schema APIs to JunoClient

* start implementing buildSchemaNode

* finish getSchemaNodes

* finish implementing addSchema

* cleanup

* make schema optional

* handle undefined/null schema and fields. Also don't retry on gettting schema failures.

* fix request schema and get schema endpoints

* add feature flag

* try to get most recent schema when refreshed or initialized.

* add tests

* cleanup

* cleanup

* cleanup

* fix merge conflict typos

* fix lint errors

* fix tests and update snapshot

Co-authored-by: REDMOND\gaausfel <gaausfel@microsoft.com>

src/Contracts/DataModels.ts

@@ -88,6 +88,38 @@ export interface Resource {
   id: string;
 }
 
+export interface IType {
+  name: string;
+  code: number;
+}
+
+export interface IDataField {
+  dataType: IType;
+  hasNulls: boolean;
+  isArray: boolean;
+  schemaType: IType;
+  name: string;
+  path: string;
+  maxRepetitionLevel: number;
+  maxDefinitionLevel: number;
+}
+
+export interface ISchema {
+  id: string;
+  accountName: string;
+  resource: string;
+  fields: IDataField[];
+}
+
+export interface ISchemaRequest {
+  id: string;
+  subscriptionId: string;
+  resourceGroup: string;
+  accountName: string;
+  resource: string;
+  status: string;
+}
+
 export interface Collection extends Resource {
   defaultTtl?: number;
   indexingPolicy?: IndexingPolicy;
@@ -98,6 +130,8 @@ export interface Collection extends Resource {
   changeFeedPolicy?: ChangeFeedPolicy;
   analyticalStorageTtl?: number;
   geospatialConfig?: GeospatialConfig;
+  schema?: ISchema;
+  requestSchema?: () => void;
 }
 
 export interface Database extends Resource {