feat(query-optimization): implement GraphQL query optimization and enhance regression suite

- **Optimization**: Implemented automatic Zabbix parameter optimization by analyzing GraphQL selection sets.

- **ZabbixRequest**: Added optimizeZabbixParams with support for skippable parameters and implied field dependencies (e.g., state -> items).

- **Resolvers**: Updated allHosts, allDevices, allHostGroups, and templates to pass requested fields to data sources.

- **Data Sources**: Optimized ZabbixQueryHostsGenericRequest and ZabbixQueryTemplatesRequest to skip unnecessary Zabbix API calls.

- **Regression Tests**: Enhanced RegressionTestExecutor with new tests for optimization (REG-OPT, REG-OPT-NEG), state retrieval (REG-STATE), dependent items (REG-DEP), and empty results (REG-EMPTY).

- **Documentation**: Created query_optimization.md How-To guide and updated roadmap.md, README.md, and tests.md.

- **Bug Fixes**: Fixed deviceType tag assignment during host import and corrected ZabbixCreateHostRequest to support tags.

src/datasources/graphql-params-to-zabbix-output.ts

@@ -0,0 +1,26 @@
+import {GraphQLResolveInfo} from "graphql";
+import {getRequestedFields} from "../api/graphql_utils.js";
+import {
+    QueryAllDevicesArgs,
+    QueryAllHostGroupsArgs,
+    QueryAllHostsArgs,
+    QueryTemplatesArgs
+} from "../schema/generated/graphql.js";
+
+export class GraphqlParamsToNeededZabbixOutput {
+    static mapAllHosts(args: QueryAllHostsArgs, info: GraphQLResolveInfo): string[] {
+        return getRequestedFields(info);
+    }
+
+    static mapAllDevices(args: QueryAllDevicesArgs, info: GraphQLResolveInfo): string[] {
+        return getRequestedFields(info);
+    }
+
+    static mapAllHostGroups(args: QueryAllHostGroupsArgs, info: GraphQLResolveInfo): string[] {
+        return getRequestedFields(info);
+    }
+
+    static mapTemplates(args: QueryTemplatesArgs, info: GraphQLResolveInfo): string[] {
+        return getRequestedFields(info);
+    }
+}