[moetemp]

What changed?

This PR adds tests that act as a harness for later changes to the Redis Store. A change that breaks a rule of the Store fails one of them before review.

• tests/parity.rs runs the same seeded random calls on the memory Store and the Redis Store, and compares the answers. The calls cover creates, appends, closes, reads, reverse reads, retry-run withdrawals and Local Activity task facts. A refused write must also leave the Stream's Redis keys as they were. A failure prints its seed and its last calls, and STREAMS_PARITY_SEED=<seed> replays it.
• docs/redis.md is now the only list of each role's commands. tests/acl.rs reads it, and a unit test checks that each role's scripts call exactly those commands. Another unit test checks that the docs' load command gives the read scripts' exact bytes.
• A unit test checks that a Stream's four keys share one cluster slot for any id.
• A cluster case checks that a standalone Store at a cluster node, with a user that has no +info, gets a config error.

Why?

Agents will make more of the changes to this crate. These tests check the rules that a reviewer would otherwise check by hand. Both Stores agree, a refusal writes nothing, and the docs match the scripts.

I checked each test against a deliberate bug, and each bug failed its test. The bugs were a script write before a refusal, a wrong resend answer, a read with one entry too many, a missing orphan item, a missing run fence, a command that the docs don't list, and a MOVED mapping that does nothing. A long parity run on standalone Redis and on a cluster found no difference between the Stores.

How did you test it?

crates/streams-redis/scripts/redis-test-servers.sh
STREAMS_PARITY_SEEDS=3000 cargo test -p temporalio-streams-redis --test parity -- --include-ignored

• Unit Tests
• Staging
• End to End Tests

[moetemp]

These tests are now in the stack, so each PR has the tests of its own code. The docs checks, the slot check, the standalone case and the parity check are on #1, from 18ae3e3 to 40c9b9a. The withdrawal part of the parity check is on #2 in 11adf65. #3 has all of it through its merge.