Reject non-canonical badge encodings in Verify#24
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This was referenced Jun 22, 2026
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Scrub hardening (defense-in-depth). Verify re-encodes the parsed badge via Canonical and rejects any input that doesn't round-trip (leading zeros, '+' signs) before checking the signature — forecloses byte-string-vs-parsed-fields malleability. Issuer always signs canonical form, so production badges unaffected (golden vectors pass). Test added.