refactor(tests): restructure into layered POM architecture with Allure reporting

- Split framework into core/ (config, logger, db, driver factories, screenshot,
  allure integration) and pages/ (PO layer: base/admin/driver); flatten test
  files per platform (web/admin, app/driver_android, cross_end)
- Slim root conftest.py 656 -> ~100 lines: drop inline CN HTML report, add
  Allure severity mapping (p0/p1/p2 -> blocker/normal/minor) and
  environment.properties; support both tests.*-prefixed and bare imports
- Preserve TC-D2S-001/002 cross-end E2E cases with business logic unchanged,
  add allure epic/feature/story/step annotations
- Deduplicate: single makereport hook, shared failure-screenshot helpers,
  single SCREENSHOTS_DIR constant; deterministic auth-state role loading
- Move DB credentials from db_helper.py into test_config.yaml (database section)
- Move pytest.ini to repo root; switch reporting to allure-pytest
  (drop pytest-html/junitxml); update requirements.txt accordingly
- Delete deprecated scaffolding: test_freight_full_flow + 6 stale page
  objects, iOS/shipper empty shells, dead utils
- Fix flaky vxe-table action-row wait: wait for a visible td instead of
  hidden placeholder rows (fixed shipper-payment timeouts)
- Verified end-to-end against live env: both E2E cases pass (2 passed 3m12s);
  run artifacts (logs/screenshots/allure) included per repo convention

output/allure-report/export/influxDbData.txt

@@ -0,0 +1,13 @@
+launch_status failed=0 1786930375000000000
+launch_status broken=0 1786930375000000000
+launch_status passed=2 1786930375000000000
+launch_status skipped=0 1786930375000000000
+launch_status unknown=0 1786930375000000000
+launch_time duration=185875 1786930375000000000
+launch_time min_duration=89711 1786930375000000000
+launch_time max_duration=89794 1786930375000000000
+launch_time sum_duration=179505 1786930375000000000
+launch_time start=1786930187121 1786930375000000000
+launch_time stop=1786930372996 1786930375000000000
+launch_retries retries=0 1786930375000000000
+launch_retries run=2 1786930375000000000

output/allure-report/export/mail.html

@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <meta charset="utf-8">
+    <title>Allure Report summary mail</title>
+</head>
+<body>
+    Mail body
+</body>
+</html>

output/allure-report/export/prometheusData.txt

@@ -0,0 +1,13 @@
+launch_status_failed 0
+launch_status_broken 0
+launch_status_passed 2
+launch_status_skipped 0
+launch_status_unknown 0
+launch_time_duration 185875
+launch_time_min_duration 89711
+launch_time_max_duration 89794
+launch_time_sum_duration 179505
+launch_time_start 1786930187121
+launch_time_stop 1786930372996
+launch_retries_retries 0
+launch_retries_run 2