Add missing seqcoding method implementation to adapter class

adapter.py

@@ -754,6 +754,28 @@ class AbLang2PairedHuggingFaceAdapter(AbEncoding, AbRestore, AbAlignment, AbScor
                     plls.append(float('nan'))
         return np.array(plls)
 
+    def seqcoding(self, seqs, **kwargs):
+        """Sequence specific representations - returns 480-dimensional embeddings for each sequence."""
+        # Format input: join VH and VL with '|'
+        formatted_seqs = []
+        for s in seqs:
+            if isinstance(s, (list, tuple)):
+                formatted_seqs.append('|'.join(s))
+            else:
+                formatted_seqs.append(s)
+        
+        # Get embeddings using the model
+        embeddings = self._encode_sequences(formatted_seqs)
+        
+        # Return sequence-level embeddings (mean pooling over sequence length)
+        # Remove batch dimension and take mean over sequence dimension
+        if len(embeddings.shape) == 3:  # [batch_size, seq_len, hidden_size]
+            seq_embeddings = embeddings.mean(dim=1)  # [batch_size, hidden_size]
+        else:
+            seq_embeddings = embeddings
+        
+        return seq_embeddings.cpu().numpy()
+
     def confidence(self, seqs, **kwargs):
         """Confidence calculation - match original ablang2 implementation by excluding all special tokens from loss."""
         # Format input: join VH and VL with '|'