Support PySAM on Python 3.14 via nlr-pysam package

- Update optional dependency from 'nrel-pysam' to 'nlr-pysam'
- Uncomment nlr-pysam in Python 3.14 CI requirements
- PySAM 8.0.0+ is distributed as nlr-pysam for Python 3.8-3.14

Note: test_fit_cec_sam shows minor numerical differences between
nlr-pysam 8.0.0+ and nrel-pysam, particularly in the 'Adjust'
parameter. This may indicate algorithmic changes in the newer
nlr-pysam distribution that needs further investigation.

Fixes #2871

Author: mokazemi

ci/requirements-py3.14.yml

@@ -1,28 +1,28 @@
 name: test_env
 channels:
-    - defaults
-    - conda-forge
+  - defaults
+  - conda-forge
 dependencies:
-    - coveralls
-    - cython
-    - ephem
-    - h5py
-    # - numba  # not available for py 3.14 as of 2025-11-03
-    - numpy >= 1.21.2
-    - pandas >= 1.3.3
-    - pip
-    - pytest
-    - pytest-cov
-    - pytest-mock
-    - requests-mock
-    - pytest-timeout
-    - pytest-rerunfailures
-    - conda-forge::pytest-remotedata  # version in default channel is old
-    - python=3.14
-    - pytz
-    - requests
-    - scipy >= 1.7.2
-    - statsmodels
-    - pip:
-        # - nrel-pysam>=2.0  # not available for py 3.14 as of 2025-11-03
-        - solarfactors
+  - coveralls
+  - cython
+  - ephem
+  - h5py
+  # - numba  # not available for py 3.14 as of 2025-11-03
+  - numpy >= 1.21.2
+  - pandas >= 1.3.3
+  - pip
+  - pytest
+  - pytest-cov
+  - pytest-mock
+  - requests-mock
+  - pytest-timeout
+  - pytest-rerunfailures
+  - conda-forge::pytest-remotedata # version in default channel is old
+  - python=3.14
+  - pytz
+  - requests
+  - scipy >= 1.7.2
+  - statsmodels
+  - pip:
+      - nlr-pysam>=2.0 # not available for py 3.14 as of 2025-11-03
+      - solarfactors

pyproject.toml

@@ -49,7 +49,7 @@ dynamic = ["version"]
 optional = [
     'cython',
     'ephem',
-    'nrel-pysam',
+    'nlr-pysam',
     'numba >= 0.17.0',
     'solarfactors >= 1.6.1',
     'statsmodels',