v6.3.1

Upgrade priority: Low. Recommended for Kusama & Polkadot runtime 9100+

Changes:

• Mark api.query.*.*.at as deprecated (use api.at)
• Expose queryMulti, findError and findCall on api.at
• Optimize parallel metadata retrieval/decoration
• Rework derive .at to ensure no additional metadata calls
• Adjust Xcm types for Kusama, Polkadot, Westend (V1 & V2 usage)
• Fix Xcm Fungibility type
• Add upgrade blocks for Westend
• Prepare for v14 metadata swap in Kusama/Polkadot (9110 runtime)
• Adjust metadata wilcard path matching (event extraction)
• Bump static metadata for latest Substrate, Polkadot & Kusama