fix(skills): green telegram skill tests (telethon stub) + pyright pytest resolution

- telegram skill: register a minimal telethon sys.modules stub in the test
  conftest so botfather_client tests (which patch telethon.*) run without the
  optional MTProto library installed. Fixes 7 ModuleNotFoundError failures;
  telegram suite now 452/452 green.
- pyrightconfig.json: add the root .venv site-packages to extraPaths (has
  pytest + project deps) alongside memory's venv, so the @hooks auto_fix
  pyright check stops emitting false 'Import pytest could not be resolved' on
  every test file. CI does not run pyright; this is local-DX only.

Both CI-safe: telegram tests live under .aipass/ (excluded from umbrella
pytest) and pyright is not a CI gate, so PR #640 stays green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

pyrightconfig.json

@@ -1,5 +1,9 @@
 {
-  "extraPaths": ["src", "src/aipass/memory/.venv/lib/python3.12/site-packages"],
+  "extraPaths": [
+    "src",
+    ".venv/lib/python3.12/site-packages",
+    "src/aipass/memory/.venv/lib/python3.12/site-packages"
+  ],
   "pythonVersion": "3.10",
   "reportMissingImports": "error",
   "reportAttributeAccessIssue": "error",

src/aipass/skills/.aipass/skills/telegram/tests/conftest.py

@@ -18,6 +18,7 @@ import os
 import shutil
 import sys
 import tempfile
+import types
 from pathlib import Path
 from typing import Generator
 
@@ -37,6 +38,38 @@ if str(_skill_root) not in sys.path:
     sys.path.insert(0, str(_skill_root))
 
 
+# Telethon stub — telethon is an OPTIONAL runtime dependency (MTProto client),
+# deliberately NOT in pyproject so the core stays lightweight (botfather_client.py
+# guards it with TELETHON_AVAILABLE). The botfather_client tests mock all Telethon
+# classes (patch("telethon.TelegramClient"), etc.), but unittest.mock.patch must
+# IMPORT the target's parent module to set the attribute — which raises
+# ModuleNotFoundError when telethon isn't installed (e.g. in CI). Register a minimal
+# stub so those patch targets resolve. The guard never clobbers a real telethon if
+# one is installed. Real FloodWaitError/RPCError classes are required for the
+# success/timeout tests, where _send_and_wait imports them but does not patch them.
+if "telethon" not in sys.modules:
+    _telethon_stub = types.ModuleType("telethon")
+    _telethon_errors = types.ModuleType("telethon.errors")
+
+    class StubFloodWaitError(Exception):
+        def __init__(self, *args: object, seconds: int = 0, **kwargs: object) -> None:
+            self.seconds = seconds
+            super().__init__(*args)
+
+    class StubRPCError(Exception):
+        pass
+
+    # ModuleType attributes are dynamic — assign via setattr so the type checker
+    # does not flag assignment to "unknown" module attributes.
+    setattr(_telethon_stub, "TelegramClient", type("TelegramClient", (), {}))  # patched per-test
+    setattr(_telethon_errors, "FloodWaitError", StubFloodWaitError)
+    setattr(_telethon_errors, "RPCError", StubRPCError)
+    setattr(_telethon_stub, "errors", _telethon_errors)
+
+    sys.modules["telethon"] = _telethon_stub
+    sys.modules["telethon.errors"] = _telethon_errors
+
+
 @pytest.fixture(autouse=True, scope="session")
 def _redirect_prax_logs(tmp_path_factory):
     """Redirect Prax logger output to temp dir during tests.