[PR] docs: Keyspaces config sets LOCAL_QUORUM on the plugin profile and shows truststore settings [pekko-persistence-cassandra]

["pjfanning (via GitHub)" <gi...@apache.org>]

pjfanning opened a new pull request, #515:
URL: https://github.com/apache/pekko-persistence-cassandra/pull/515

   ### Motivation
   
   The Amazon Keyspaces example sets `basic.request.consistency = LOCAL_QUORUM`, but the plugin's `pekko-persistence-cassandra-profile` sets `consistency = QUORUM` in `reference.conf`, which overrides it for every journal and snapshot request. The example also does not show the truststore settings that `DefaultSslEngineFactory` needs for the Keyspaces TLS endpoint.
   
   ### Modification
   
   Port of akka/akka-persistence-cassandra#1029 (Akka Persistence Cassandra 1.2.0, Apache 2.0 since its change date 2026-10-25), adapted to Pekko:
   
   - Add a `profiles.pekko-persistence-cassandra-profile` block setting `LOCAL_QUORUM` (upstream uses the Akka profile name).
   - Add `truststore-path`, `truststore-password` and `hostname-validation` to the `ssl-engine-factory` example.
   - Add a sentence explaining why the profile override is needed. This sentence is Pekko-only.
   
   ### Result
   
   The Keyspaces configuration example uses `LOCAL_QUORUM` for the plugin's own requests and shows the TLS truststore settings.
   
   ### Tests
   
   - Not run - docs only
   - `sbt docs/paradox` — passed.
   - `git diff --check` — clean.
   
   ### References
   
   Refs akka/akka-persistence-cassandra#1029 - source of the change (Akka Persistence Cassandra 1.2.0, BSL change date 2026-10-25).
   


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