refactor(query): deepen runtime context/native adapter/output seams (#3076)

* refactor(query): deepen runtime context, native adapter, and cli output seams

* chore(changeset): add fragment for query seam deepening continuation

* refactor(query): converge internal command-resolution imports on canonical seam

* refactor(query): remove dead seam wrappers and converge on canonical modules

* docs(architecture): update context and adr for query seam completion

* fix(query): preserve gsd-tools stderr in cli output and clarify static ws test scope

* test(query): cover whitespace stderr and null exitCode fallback

sdk/src/query/query-runtime-context.ts

@@ -0,0 +1,29 @@
+import { findProjectRoot } from './helpers.js';
+import { validateWorkstreamName } from '../workstream-utils.js';
+
+export interface QueryRuntimeContextInput {
+  projectDir: string;
+  ws?: string;
+}
+
+export interface QueryRuntimeContext {
+  projectDir: string;
+  ws?: string;
+}
+
+export function resolveQueryRuntimeContext(input: QueryRuntimeContextInput): QueryRuntimeContext {
+  const projectDir = findProjectRoot(input.projectDir);
+
+  if (input.ws !== undefined) {
+    return {
+      projectDir,
+      ws: validateWorkstreamName(input.ws) ? input.ws : undefined,
+    };
+  }
+
+  const envWs = process.env.GSD_WORKSTREAM;
+  return {
+    projectDir,
+    ws: envWs && validateWorkstreamName(envWs) ? envWs : undefined,
+  };
+}