Fix pipeline type when creating a new pipeline being off by one (#2229)

## Description

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This cherry-picks the bug fix from #2225, but not the tests as we're
having issues with those. #2225 will remain open for the tests.

https://github.com/PhotonVision/photonvision/pull/2204 fixed the
off-by-one error on the frontend, but again, because enums are
serialized with ordinal(), DataSocketHandler needed to be updated to
account for the indices shifting by one.

## Meta

Merge checklist:
- [x] Pull Request title is [short, imperative
summary](https://cbea.ms/git-commit/) of proposed changes
- [x] The description documents the _what_ and _why_
- [ ] If this PR changes behavior or adds a feature, user documentation
is updated
- [ ] If this PR touches photon-serde, all messages have been
regenerated and hashes have not changed unexpectedly
- [ ] If this PR touches configuration, this is backwards compatible
with settings back to v2025.3.2
- [ ] If this PR touches pipeline settings or anything related to data
exchange, the frontend typing is updated
- [ ] ~If this PR addresses a bug, a regression test for it is added~
Deferred

Co-authored-by: Gold856 <117957790+Gold856@users.noreply.github.com>

photon-server/src/main/java/org/photonvision/server/DataSocketHandler.java

@@ -155,7 +155,7 @@ public class DataSocketHandler {
                             // var name = (String) data.get("pipelineName");
                             var arr = (ArrayList<Object>) entryValue;
                             var name = (String) arr.get(0);
-                            var type = PipelineType.values()[(Integer) arr.get(1) + 2];
+                            var type = PipelineType.values()[(Integer) arr.get(1) + 3];
 
                             dcService.publishEvent(
                                     new IncomingWebSocketEvent<>(