Release 2.8.0-preview.3

[mtmk]

Preview release bumping version to 2.8.0-preview.3. Adds nats-server 2.14 features: ResetConsumerAsync (ADR-60), $JS.FC.* flow-control reply subject support for the js_ack_fc_v2 flag, and a Consumer field on StreamSource for pre-created mirror/source consumers. Also a fix for in-flight message loss on consumer/connection dispose, behind a new opt-in drain.

• Add consumer reset API (Add consumer reset API #1126, server 2.14)
• Add $JS.FC support to JS metadata parser (Add $JS.FC support to JS metadata parser #1127, server 2.14)
• Add consumer field on stream source/mirror (Add consumer field on stream source/mirror #1128, server 2.14)
• Fix message loss on consumer dispose (Fix message loss on consumer dispose #1085)

[synadia-claude-reviewer]

Claude encountered an error —— View job

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PR Review

• Gather context: read CLAUDE.md and PR diff
• Review feature changes (consumer reset, FC support, stream source consumer field, message loss fix)
• Check API compatibility and correctness
• Post review findings

[synadia-claude-reviewer]

Claude encountered an error —— View job

---

PR Review

• Gather context: read CLAUDE.md and PR diff
• Review feature changes (consumer reset, FC support, stream source consumer field, message loss fix)
• Check API compatibility and correctness
• Post review findings

[piotrpio]

LGTM