feat: publish completed CipherBid lifecycle

[SourceSenseiTheRealOne]

Publishes the verified seller-proceeds claim and closes the mainnet value ledger.

• adds the fifth qualifying STRK20 transaction
• publishes final seller authorization and claim receipts
• proves zero actual/accounted AuctionHouse balance
• fixes long current-owner address wrapping
• rewrites the judge-facing README with architecture and user-flow diagrams
• adds the under-three-minute live demo presentation script

No wallet, recovery, contract, or chain-execution logic changes.

[coderabbitai]

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