refactor!: claim references are claim:TAG

lode is renamed paperclaim. A claim reference is claim:TAG or
claim:host/TAG and a pin claim:TAG@hex6 (claimRef and claimPin in
common.schema.json, spec/18 §18.4, spec/02, spec/20); the eight-character
tags do not change. A project names its claim namespace as
claims.paperclaim, and the main example's targeted receipts take the
scope targeted:paperclaim. No old prefix or name is accepted.

paperspec build regenerated the fixtures and vectors: the claim link's and
the symbol's record IDs, the layer receipt, project.json, the two targeted
receipts and Ben's spot-check, the QA report, the inclusion proof, the log's
checkpoint and tiles, and the signature, spot-check, VRF and checkpoint
vectors. The walkthrough and examples quote the new receipt IDs.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SarHTuHhV9cS85XWy2NrLJ

docs/glossary.md

@@ -179,7 +179,7 @@ Suspect
 
 Symbol key
 :   The name of a symbol in a formula, its canonical TeX with `\mathrm` spelled `\text`: `K_{r}` for `K_r`.
-A paper's symbols and a lode claim's have one key, so a `symbol` annotation names its symbol by it. ([9.4](../spec/09-figures-tables-equations.md#94-the-math-form), [18.4](../spec/18-layers.md#184-bodies))
+A paper's symbols and a paperclaim claim's have one key, so a `symbol` annotation names its symbol by it. ([9.4](../spec/09-figures-tables-equations.md#94-the-math-form), [18.4](../spec/18-layers.md#184-bodies))
 
 Targeted F3
 :   Proofreading the nodes a team's claims, quotations and datasets rest on, rather than every node.