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deb6929670
* persistency: follow nim-sds 0.3.0 snapshot persistence contract nim-sds 0.3.0 replaced the ~14 fine-grained per-row Persistence callbacks with a 5-proc snapshot model (saveChannelMeta / updateHistory / loadChannel / dropChannel / setRetrievalHint), all returning Future[Result[...]]. Rewrite waku/persistency/sds_persistency.nim accordingly: - ChannelMeta is stored as one blob per channel; the message log as append/evict rows. Categories collapse from 7 to 2 (sds.meta, sds.log). - Blob transform uses nim-sds' own codecs: snapshot_codec (schema-versioned protobuf) for ChannelMeta, the SDS wire codec for SdsMessage log rows. The generic payload_codec/BlobCodec path is retired (removed payload_codec.nim and test_blob_codec.nim). - setRetrievalHint is a deliberate no-op: persisted hints are never read back (loadChannel/ChannelMeta carry none; hints are supplied live via the onRetrievalHint provider). The closure stays because the field is required. - Fix the module import spelling (srcDir="sds" => bare module paths), which the previous adapter got wrong and never compiled against the locked deps. Add tests/persistency/test_sds_persistency.nim (round-trip, empty-load, evict, drop) replacing test_blob_codec in test_all. Full persistency suite passes 74/74 under both refc and ORC. * Bump to latest nim-sds and nim-brokers 3.1.1 * Update with latest nim-sds changes - removal of setRetrievalHints - not needed