Note

Medium Risk
Changes the RDB deserialization path to return Errors (including unknown node types/encoding versions and JSON/UTF-8 serialization failures) instead of panicking, which could affect module loading behavior for malformed or unexpected persisted data.

Overview
Improves RedisJSON RDB backward-loading to fail gracefully rather than panic.

backward::json_rdb_load now uses TryFrom<u64> for NodeType and returns an Error on unknown node type values, and value_rdb_load_json propagates JSON serialization/UTF-8 errors and returns an Error for unsupported encver instead of panicking.

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