RDSC-3989: Add information for new performance metrics#2119

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zhivko-kirishev-redis:RDSC-3989-add-information-for-new-performance-metrics

Commits on Sep 10, 2025

Update the RDI openapi and observability documentation by adding information for the newly exposed processor performance metrics
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Commits on Sep 16, 2025

Replace rdi_processor_performance_batch_avg with multiple standalone
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Commits on Sep 19, 2025

Document `rdi_processor_rec_per_sec_total` as Gauge
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Commits on Sep 24, 2025

Move `rdi_processed_batches_total` to the `Processor Performance Total
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Commits on Sep 25, 2025

Address review comments about wording
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