Phase B fixup: re-export TelemetryConfig from copilot package

Test collection broke on CI because e2e/test_telemetry_e2e.py imports it
from the top-level package; only the dataclass option types had been
re-exported.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: SteveSandersonMS

python/copilot/__init__.py

@@ -18,6 +18,7 @@
     RuntimeConnection,
     StdioRuntimeConnection,
     TcpRuntimeConnection,
+    TelemetryConfig,
     UriRuntimeConnection,
 )
 from .session import (
@@ -101,6 +102,7 @@
     "SessionUiCapabilities",
     "StdioRuntimeConnection",
     "TcpRuntimeConnection",
+    "TelemetryConfig",
     "Tool",
     "ToolBinaryResult",
     "ToolInvocation",