## Description
WPILib switched from FasterXML Jackson to Avaje Jsonb for speed reasons
in https://github.com/wpilibsuite/allwpilib/pull/8721. This does the
same for PhotonVision. Some temporary Jackson adapters are present to
allow compatibility with alpha-4 ahead of updating Photon's WPILib
version. A few old backwards compatibility migrations were also dropped
if they were difficult to port to Avaje Jsonb or otherwise complicated
the code.
## 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_, including events
that led to this PR
- [ ] 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 all settings going back to the previous seasons's last release
(seasons end after champs ends)
- [ ] 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
- [ ] If this PR adds a dependency, the license has been checked for
compatibility and steps taken to follow it
---------
Co-authored-by: samfreund <samf.236@proton.me>
Co-authored-by: Matt Morley <matthew.morley.ca@gmail.com>
## Description
Previously, when attempting to load a model that did not follow the old
naming pattern that was in the models directory, we caused PV to crash
due to a missing early return (reproducable on this branch with the
extra bonus ML model and missing label file):
```
[2026-02-01 17:35:15] [Config - NeuralNetworkModelManager] [ERROR] Model properties are null. This could mean the config for model /home/matth/photonvision/test-resources/old_configs/2025.3.1-old-nnmm/models/iCauseProblems.rknn was unable to be found in the database. Trying legacy...
[2026-02-01 17:35:15] [Config - NeuralNetworkModelManager] [ERROR] Failed to translate legacy model filename to properties: /home/matth/photonvision/test-resources/old_configs/2025.3.1-old-nnmm/models/iCauseProblems.rknn: /home/matth/photonvision/test-resources/old_configs/2025.3.1-old-nnmm/models/iCauseProblems-labels.txt
SQLConfigTest > testLoadNewNNMM() FAILED
java.lang.NullPointerException: Cannot invoke "org.photonvision.common.configuration.NeuralNetworkModelsSettings$ModelProperties.toString()" because "properties" is null
at org.photonvision.common.configuration.NeuralNetworkModelManager.loadModel(NeuralNetworkModelManager.java:342)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
```
This PR fixes it by adding the missing early-return, and adding unit
tests to make sure we handle this.
## 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_, including events
that led to this PR
- [ ] 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 all settings going back to the previous seasons's last release
(seasons end after champs ends)
- [ ] If this PR touches pipeline settings or anything related to data
exchange, the frontend typing is updated
- [x] If this PR addresses a bug, a regression test for it is added
---------
Co-authored-by: Matt M <matthew.morley.ca@gmail.com>
