Heartbeat service resolves cwd from task session, project primary
workspace, or agent home directory (~/.paperclip/instances/.../workspaces/).
Adapters receive workspace context and forward it as env vars and
session params. cwd is now optional in adapter config.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Introduces a provider-agnostic storage subsystem for file attachments.
Includes local disk and S3 backends, asset/attachment DB schemas, issue
attachment CRUD routes with multer upload, CLI configure/doctor/env
integration, and enriched issue ancestors with project/goal resolution.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
