fix(tests): eliminate flaky/broken tests — shadow sys.path inserts, unmocked network in compressor tests, stale-SDK feishu pin guard, quadratic redact regexes

- Remove tests/-shadowing sys.path.insert(dirname/'..') from 11 test files:
  it prepended the tests/ dir itself to sys.path, so 'import agent' /
  'import hermes_cli' resolved to the test packages and collection died
  with ModuleNotFoundError depending on import order (2 files failed in
  every full-suite run; 9 more were latent).
- Patch call_llm in 5 context-compressor tests that called compress()
  unmocked: each burned ~50s attempting live LLM traffic through the
  relay before falling back (572s file — the slowest in the suite, and
  flaky under the 300s per-file timeout). File now runs in ~5s.
- agent/redact.py: fix two catastrophically-backtracking regexes hit by
  the compressor's redaction pass on large payloads —
  _STRICT_URL_USERINFO_RE anchors on the mandatory '//' (optional-scheme
  prefix backtracked O(n^2): ~55s on a 320KB payload, now sub-ms;
  output-equivalence fuzz-verified on 20k random strings), and the
  _CFG_DOTTED_RE/_CFG_ANCHORED_RE subs gain an exact linear keyword
  pre-gate so secret-free text skips the quadratic pattern entirely.
- tests/gateway/test_feishu.py: version-guard the extra_ua_tags SDK
  signature check; the repo pins lark-oapi==1.6.8 but stale local
  installs (1.5.3) fail the assertion — skip below the pin.
- tests/tools/test_managed_browserbase_and_modal.py: stub
  agent.redact + agent.credential_persistence in the fake agent package
  (empty __path__ blocks all real agent.* imports added since the fake
  was written).
- tests/gateway/test_startup_restart_race.py: raise wait_for timeouts
  2s -> 30s; 2s wall-clock on a loaded 40-worker box flaked in the
  baseline run (passes instantly when the box is quiet).

tests/cli/test_tool_progress_scrollback.py

@@ -5,12 +5,10 @@ persistent lines to scrollback on tool.completed, restoring the stacked
 tool history that was lost when the TUI switched to a single-line spinner.
 """
 
-import os
 import sys
 import importlib
 from unittest.mock import MagicMock, patch
 
-sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
 
 # Module-level reference to the cli module (set by _make_cli on first call)
 _cli_mod = None