2.26.3

Core

• Fix pending queue lookup race in message delivery #1615 @scottf

JetStream

• Support ADR 60 Ack Policy Flow Control #1624 @scottf
• Support ADR 50 Fast Ingest with constants #1628 @scottf

Service

• Fix discoverMany handling of a no responders status #1620 @scottf

Test

• Update Test Server Runner (Major Version) #1617 @scottf
• Fix test to respect server 2.15 change to max_consumers behavior #1623 @scottf

CI/CD

• Update GitHub Actions to Node 24 majors, install nats-server via shared action #1618 @scottf
• Add a Windows build workflow #1619 @scottf
• Update org.bouncycastle:bcprov-lts8on #1622 @bugada @scottf