Nebula 3.0.33

Changes since nebula-v3.0.32:

• b563e1a1 Store workspace provenance in shared indexed ledger
• e66c641f Format product passage regression
• 21207cfb Keep product guidance intact across indexed passages
• 14d061a5 Normalize gateway failures with offered usage and receipt context
• 5937f76b Deliver failed tool receipts and guidance to provider agents
• be81d67d Add actionable failure contract for Core tools and built-in MCPs
• aa51013e Give Butler actionable capability error receipts