Sideband v0.1.0

Sideband is an asynchronous, provenance-bearing context relay for DeepSeek Harness.

• Native /sideband send, status, cancel, and targets commands
• Immediate command-boundary snapshots, including visible streaming partial output
• Independent tool-free summarizer with bounded input/output
• Session quiet/wakeup delivery and optional Agent Team Room delivery
• Native DSH Web target picker in the same package, without replacing host UI
• Explicit process-local queue and Host-restart loss semantics
• English/Chinese docs, security policy, architecture artwork, and real UI screenshot

Verified with 21 tests, clean-profile DSH installation, real Web boot, and Playwright command dispatch.