fix(connectors): reject duplicate SDK open calls#3265
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The sink_connector! and source_connector! macros silently overwrote an existing INSTANCES entry on a duplicate open call, discarding any in-flight buffered data and orphaning the prior connector tasks. Return -1 on duplicate id so callers see the failure and can drain or close explicitly before re-opening. Closes apache#3168. Signed-off-by: Mukunda Rao Katta <mukunda.vjcs6@gmail.com>
…onnector-duplicate-open
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fix/sink-source-connector-duplicate-open.Validation