Add debug events and cleanup commands

[apresmoi]

Summary

• add server.debug_events diagnostics for attachment disconnect reasons, bridge-reported runtime errors, wake delivery, and wake failure events
• expose cleanup topology through admin-only DELETE /v1/agents/{agentID} and DELETE /v1/rooms/{roomID} plus moltnet remove-agent and moltnet remove-room
• soft-remove agents and rooms from active rosters while retaining stored message history, revoking open-mode agent registrations, and closing removed live attachments
• update the console event stream/rendering, embedded assets, CLI docs, HTTP docs, configuration docs, operating guides, and Moltnet skill guidance

Verification

• go test ./internal/transport ./internal/rooms ./internal/store
• go test ./...
• npm --prefix web run typecheck
• npm --prefix web run build
• npm --prefix website run build
• git diff --check