[Enhance] Add copy interface for SequenceContext
#1451
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This was referenced Jan 28, 2026
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ghstack-source-id: 69a9fd4 Pull-Request: InternLM#1451
HAOCHENYE
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ghstack-source-id: 69a9fd4 Pull-Request: InternLM#1451
HAOCHENYE
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ghstack-source-id: 1f6057d Pull-Request: InternLM#1451
HAOCHENYE
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ghstack-source-id: 1f6057d Pull-Request: InternLM#1451
HAOCHENYE
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ghstack-source-id: 4b149b4 Pull-Request: InternLM#1451
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Stack from ghstack (oldest at bottom):
fullyshard in BaseModel` #1460chunk_losswhen backward with the frozelm_head#1458XTunerBaseModelConfig#1456DataloaderConfig#1454clean_param_name#1452SequenceContext#1451float8_handlerinfully_shared#1450