fix(qqbot): add is_reconnect param to connect() to match base contract

[mapleafgo]

QQAdapter.connect() was missing the *, is_reconnect: bool = False keyword argument required by BasePlatformAdapter. The gateway's reconnect watcher calls connect(is_reconnect=True) when re-establishing a failed platform connection, causing::

TypeError: QQAdapter.connect() got an unexpected keyword argument 'is_reconnect'

This meant every automatic reconnection attempt (default every 300s) immediately failed with the same TypeError, making the QQ Bot platform permanently stuck in a reconnection loop without ever successfully reconnecting.

[alt-glitch]

This was generated by AI during triage.

Duplicate of #52966 (the earliest still-open fix in the saturated QQBot is_reconnect cluster). This PR is the byte-identical one-line signature fix async def connect(self, *, is_reconnect: bool = False) addressing the same v0.17.0 regression (issue #52914). Note the prior cluster anchor #52922 is closed/unmerged, so #52966 is canonical.

[mapleafgo]

Duplicate of #52966 — same one-line fix, theirs is 10 days earlier. Closing in favor of #52966.