Indexer 2.8.1 RC

Highlights

• Even more enhancements to optimize import performance.
• Query optimization for certain problematic queries.
• Bug fixes for special cases.

Enhancements

• Preload asset/app creators before evaluation (#749)
• Delete txnbytes column (#772)
• Import validation tool implementation (#775)
• Update sigtype along with the rest of account data (#783)
• Increase balance of genesis accounts to 1 billion algos (#792)
• Prepare and write txn rows in parallel (#802)
• Format schema sql (#803)
• Write into txn and txn_participation tables in parallel with other import procedures (#805)
• Upgrade golang to 1.16 (#806)
• Write transactions earlier if possible (#807)
• Updating readme for postgres 13 and AZ note (#810)
• Add a readme for import validator (#811)
• Better context usage (#817)
• Create Python Test for Generated Files (#829)

Bug Fixes

• Modify outer left join query to use existing index. (#822)
• Add retry loop to block handler. (#823)
• Add IndexerDb.Close() (#801)