feat(parity): 15 new MCP tools + CLI↔MCP e2e test harness

MCP parity (CLI↔MCP symmetry for PR 103's new commands):
- cts_update_transport, cts_reassign_transport, cts_search_transports
- stat_package, get_package
- lookup_user
- run_abap (creates temp class, POST /oo/classrun, deletes)
- get_domain, get_data_element, get_structure (+source)
- get_cds_ddl, get_cds_dcl (+source)
- import_object, import_package, import_transport (wrap adt-cli
  ImportService; tmp dir in tests)
- create_object / delete_object extended with DOMA, DTEL, TABL, STRUCT,
  DDLS, DCLS dispatch (DDIC/CDS creation via typed contracts, wrapper
  keys match schema: domain / wbobj / blueSource / source).
- Mock routes (adt-fixtures) extended: object-root GET/POST/PUT/DELETE
  for CLAS/INTF/PROG/FUGR, every DDIC/CDS path (including source.main),
  oo/classrun POST, cts/transports?_action=FIND, useraction flows,
  searchconfiguration/metadata.

adt-mcp/tests/integration.test.ts: 83/83 pass including smoke tests
for every new tool.

CLI↔MCP parity harness (packages/adt-cli/tests/e2e/):
- harness.ts: startAdtHarness() boots the shared mock server, builds
  one AdtClient, wires both CLI (via __setTestAdtClient DI hook) and
  an in-memory MCP server at the same mock port. Commander program is
  built once per harness with exitOverride; runCliCommand captures
  stdout/stderr/exit. callMcpTool invokes via @modelcontextprotocol/sdk
  InMemoryTransport. assertParity runs both paths against the same
  fixtures and invokes a supplied expect() callback.
- parity.cts.test.ts (10 tests): list/get/create/release/reassign/
  delete/search/update transports.
- parity.objects.test.ts (16 tests): CRUD for class, program,
  interface; package get/list/activate/delete/stat.
- parity.ddic-cds.test.ts (16 tests): domain, dataelement, table,
  structure, DDL, DCL CRUD + source get.
- parity.misc.test.ts (24 tests): check (single + package), osql,
  run_abap, user (current/exact/search), lock/unlock, source get/put,
  info, discovery.
- smoke.test.ts (4 tests): harness self-test.

Totals: 70 parity tests, 68 pass, 2 it.todo (documented reasons:
cts tr set uses custom AdkContext bypassing global lockService;
check_syntax MCP tool lacks packageName param).

src/lib/utils/adt-client-v2.ts: adds __setTestAdtClient DI hook that
short-circuits getAdtClientV2() in tests (bypasses disk auth + ADK
init). Initialization is called once inside the harness.

bun.lock: regenerated.

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Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

Author: ThePlenkov

packages/adt-cli/src/lib/utils/adt-client-v2.ts

@@ -58,6 +58,32 @@ import {
   resetCaptured,
 } from '../shared/adt-client';
 
+// =============================================================================
+// Test DI hook (internal, used by tests/e2e harness)
+// =============================================================================
+
+let __testAdtClientOverride: AdtClient | null = null;
+
+/**
+ * @internal
+ * Install or clear a test AdtClient instance. When set, `getAdtClientV2()` will
+ * return this client instead of loading credentials from disk and constructing
+ * a real client. Intended solely for e2e harness usage.
+ *
+ * Pass `null` to clear the override.
+ */
+export function __setTestAdtClient(client: AdtClient | null): void {
+  __testAdtClientOverride = client;
+}
+
+/**
+ * @internal
+ * Inspect the current test override (mostly for diagnostics / test cleanup).
+ */
+export function __getTestAdtClient(): AdtClient | null {
+  return __testAdtClientOverride;
+}
+
 // =============================================================================
 // Client Options
 // =============================================================================
@@ -162,6 +188,12 @@ async function tryAutoRefresh(
 export async function getAdtClientV2(
   options?: AdtClientV2Options,
 ): Promise<AdtClient> {
+  // Test DI hook: if a test harness has injected a client, return it.
+  // Must short-circuit BEFORE touching disk-based auth / CLI context.
+  if (__testAdtClientOverride) {
+    return __testAdtClientOverride;
+  }
+
   // Merge with global CLI context (explicit options take precedence)
   const ctx = getCliContext();
   const effectiveOptions = {