[Dylan-M]

Proposed Change

Make generator.count only count a record once the destination has it, such as: a successful socket write, a Splunk ACK, or an OTLP export with nothing rejected. A record that fails or is dropped after it was queued is replaced so that a run ends with exactly the count delivered. Delivery is at least once, so a destination can receive duplicates. docs/finite-generation.md lists the delivery point for each output.

Breaking changes:

• The end-of-run log field records_emitted is now records_delivered.
• Validation rejects output.otlp-grpc.batchTimeout: 0 and an output.hec.batchTimeout of 0 or less. With HEC ACKs on, it also rejects an ackPollInterval or ackTimeout of 0 or less. A prometheus-remote-write batchTimeout: 0 is rejected when a count is set.
• otlp-grpc metric and trace exports now use requestTimeout, as logs do, instead of batchTimeout. Stop no longer cancels an export in flight.

stdout now buffers metrics and spans along with logs. Filegen replay retries a failed line up to three times after the rest of the pass, so retried lines arrive out of order. After the last retry it drops the line with an error log. Permit.Forgo then lowers that cycle's count, so the run still ends.

Checklist

• Changes are tested
• CI has passed