The claim ledger: every quotable claim with its basis and sources

One export of the whole claim ledger. Each claim carries a stable citation URL pointing at the exact fragment on the book page, whether the sentence is the book's own words, what kind of statement it is, and the one-line rule for quoting that kind honestly. Each external source states both what it establishes and what it does not, so a claim cannot be laundered through a real URL. Coverage is partial and the response says so.