stellar/go horizon-v2.29.0 on GitHub

Changelog

New db_error_total metrics key with labels ctx_error, db_error, and db_error_extra (5225).
Bumped go version to the latest (1.22.1) (5232)
Add metrics for ingestion loaders (5209).
Add metrics for http api requests in flight and requests received (5240).
Add MAX_CONCURRENT_REQUESTS, defaults to 1000, limits the number of horizon api requests in flight (5244)

History archive access is more effective when you pass list of URLs to Horizon: they will now be accessed in a round-robin fashion, use alternative archives on errors, and intelligently back off (5224)
Remove captive core info request error logs (5145)
Removed duplicate "Processed Ledger" log statement during resume state (5152)
Fixed incorrect duration for ingestion processor metric (5216)
Fixed sql performance on account transactions query (5229)
Fix bug in claimable balance change processor (5246)
Delay canceling queries from client side when there's a statement / transaction timeout configured in postgres (5223)

The Horizon API Transaction resource field in json result_meta_xdr is now optional and Horizon API will not emit the field when Horizon has been configured with SKIP_TXMETA=true, effectively null, otherwise if Horizon is configured with SKIP_TXMETA=false which is default, then the API Transaction field result_meta_xdr will remain present and populated with base64 encoded xdr (5228).