fix(backend): use BigInt for on-chain streamId (u64-safe) - #998
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Widen Stream.streamId / StreamEvent.streamId to Postgres bigint and keep decoded u64 values as JS bigint through the worker and API parsers so IDs above int4 max no longer fail inserts. Adds a migration and regression coverage for ids > 2^31-1. Closes LabsCrypt#829 Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
Stream.streamIdandStreamEvent.streamIdfrom PrismaInt(Postgres int4) toBigInt, with a migration that widens both columns and recreates the FK.Number(...); parse route/body IDs viaparseStreamId()and serialize BigInt safely for JSON/SSE.3_000_000_000n) through the worker and validator.Closes #829
Test plan
streamId > 2147483647persists and is readable viaGET /v1/streams/:id