feat: loadable openclaw channel plugin v1 (agent=account)
Rewritten against the real openclaw v2026.5.7 plugin SDK (generic
third-party channel path): createChannelPluginBase + createChatChannelPlugin
with required capabilities, minimal ChannelSetupAdapter, agent=account
config resolution, attached outbound -> Fabric POST, inbound socket per
account -> runtime.channel.turn (wakeup->admission). Compat notes mark
SDK-coupled seams for future openclaw upgrades. Verified: builds clean,
installs, 'openclaw channels list' -> Fabric installed/configured/enabled.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
hzhang
ece77ff2c7