nri-redis: add handlerWithoutNamespace constructor

[waj]

Adds a deliberately-named opt-out for callers who need to read or write Redis keys that aren't owned by this app and so don't follow the library's namespace convention. The existing handler / handlerAutoExtendExpire constructors continue to require a namespace, so opting out remains visible at the call site.

Internally the namespace field on Handler' becomes Maybe Text; a small namespacePrefix helper produces the ns: prefix (or empty string) consumed by query, transaction, and eval.

Tests pin down the contract: writes go to literal keys, reads don't prefix, eval script keys aren't rewritten, and foldWithScan returns keys verbatim.

[Copilot]

Pull request overview

Adds an explicit opt-out constructor for Redis key namespacing, allowing callers to intentionally operate on “literal” (non-app-owned) keys while keeping the existing namespaced constructors unchanged.

Changes:

• Add handlerWithoutNamespace constructor and re-export it from Redis.
• Make the internal handler namespace optional (Maybe Text) and centralize prefixing logic via namespacePrefix.
• Add a dedicated test suite for the no-namespace contract and update golden observability outputs + package version/changelog.

Reviewed changes

Copilot reviewed 19 out of 19 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
nri-redis/src/Redis/Handler.hs	Introduces handlerWithoutNamespace and threads optional namespace through handler acquisition.
nri-redis/src/Redis/Internal.hs	Converts handler namespace to Maybe Text and updates query/transaction/eval to use a shared prefix helper.
nri-redis/src/Redis.hs	Re-exports handlerWithoutNamespace from the public Redis module.
nri-redis/test/Helpers.hs	Adds a noNamespaceHandler to the test harness.
nri-redis/test/Spec/Redis.hs	Adds no-namespace behavior tests and updates helper addNamespace for Maybe Text.
nri-redis/test/golden-results-9.8/*	Updates golden traces for the new version and shifted source locations.
nri-redis/package.yaml	Bumps package version to 0.4.1.0.
nri-redis/nri-redis.cabal	Bumps package version to 0.4.1.0.
nri-redis/CHANGELOG.md	Documents the new handlerWithoutNamespace API.

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