[CI] Rename basic CI stage-a/b/c -> base-a/b/c for symmetry with extra CI (#25420)

test/registered/unit/model_loader/test_modelopt_export.py

@@ -19,7 +19,7 @@ from sglang.srt.configs.model_config import ModelConfig
 from sglang.srt.model_loader.loader import ModelOptModelLoader
 from sglang.test.ci.ci_register import register_amd_ci, register_cuda_ci
 
-register_cuda_ci(est_time=11, stage="stage-b", runner_config="1-gpu-large")
+register_cuda_ci(est_time=11, stage="base-b", runner_config="1-gpu-large")
 register_amd_ci(est_time=9, suite="stage-b-test-1-gpu-small-amd")
 
 # Note: PYTHONPATH=python should be set when running tests

test/registered/unit/model_loader/test_modelopt_loader.py

@@ -30,7 +30,7 @@ CALIBRATION_BATCH_SIZE = 36
 CALIBRATION_NUM_SAMPLES = 512
 DEFAULT_DEVICE = "cuda:0"
 
-register_cuda_ci(est_time=11, stage="stage-b", runner_config="1-gpu-small")
+register_cuda_ci(est_time=11, stage="base-b", runner_config="1-gpu-small")
 
 
 class TestModelOptModelLoader(CustomTestCase):

test/registered/unit/model_loader/test_prefetch_checkpoints.py

@@ -18,7 +18,7 @@ from sglang.srt.model_loader.weight_utils import (
 )
 from sglang.test.ci.ci_register import register_cpu_ci
 
-register_cpu_ci(est_time=10, suite="stage-a-test-cpu")
+register_cpu_ci(est_time=10, suite="base-a-test-cpu")
 
 
 class TestPrefetchWeightsIdentical(unittest.TestCase):

test/registered/unit/model_loader/test_runai_model_streamer_loader.py

@@ -15,7 +15,7 @@ from sglang.srt.models.deepseek_common import deepseek_weight_loader
 from sglang.test.ci.ci_register import register_cpu_ci
 from sglang.test.test_utils import CustomTestCase
 
-register_cpu_ci(est_time=6, suite="stage-a-test-cpu")
+register_cpu_ci(est_time=6, suite="base-a-test-cpu")
 
 
 class _FakeModel: