Add swvl2 to Earthmover ERA5 lexicon (#1124)

* Add swvl2 to Earthmover ERA5 lexicon

The Earthmover ERA5 Marketplace dataset now publishes volumetric soil
water layer 2, so add it to EarthMoverERA5Lexicon (and thus to
EarthMoverERA5.VARIABLES). Param id and canonical units for swvl2 were
already present in the shared metadata tables.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

* Fix typo in CHANGELOG.md for online metrics

---------

Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
Co-authored-by: Nicholas Geneva <5533524+NickGeneva@users.noreply.github.com>

Author: 3 people

CHANGELOG.md

@@ -19,9 +19,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ONNX sessions at construction instead of on first use in a rollout
 - Added regional splits to evaluation recipe scoring, in both the online
   and store-then-score pathways: `scoring.regions` takes named coordinate
-  boxes and adds a labeled `region` axis to the score stores. New
-  optional per-member online metrics include MAE (`scoring.online.mae`)
-  and log spectral distance (`scoring.online.lsd`)
+  boxes and adds a labeled `region` axis to the score stores.
+- New eval recipe optional per-member online metrics include MAE
+  (`scoring.online.mae`) and log spectral distance (`scoring.online.lsd`)
 
 ### Changed
 

earth2studio/lexicon/earthmover.py

@@ -448,6 +448,7 @@ class EarthMoverERA5Lexicon(_EarthMoverLexiconBase):
         "stl3": "stl3::sfc::",
         "stl4": "stl4::sfc::",
         "swvl1": "swvl1::sfc::",
+        "swvl2": "swvl2::sfc::",
         "t2m": "t2m::sfc::",
         "tcc": "tcc::sfc::",
         "tcw": "tcw::sfc::",

test/data/test_earthmover.py

@@ -65,6 +65,7 @@
     "stl3",
     "stl4",
     "swvl1",
+    "swvl2",
     "t2m",
     "tcc",
     "tcw",

test/lexicon/test_earthmover_lexicon.py

@@ -102,6 +102,7 @@
     "stl3": "stl3::sfc::",
     "stl4": "stl4::sfc::",
     "swvl1": "swvl1::sfc::",
+    "swvl2": "swvl2::sfc::",
     "t2m": "t2m::sfc::",
     "tcc": "tcc::sfc::",
     "tcw": "tcw::sfc::",