IL-239 add overlap_length_tokens to SteerableLongContextSummarize

src/intelligence_layer/use_cases/summarize/steerable_long_context_summarize.py

@@ -2,6 +2,7 @@
 
 from intelligence_layer.connectors import AlephAlphaClientProtocol
 from intelligence_layer.core import ChunkInput, ChunkTask, Task, TaskSpan
+from intelligence_layer.core.chunk import ChunkOutput, ChunkOverlapTask
 from intelligence_layer.core.detect_language import Language
 from intelligence_layer.use_cases.summarize.steerable_single_chunk_summarize import (
     SteerableSingleChunkSummarize,
@@ -43,16 +44,26 @@ def __init__(
         client: AlephAlphaClientProtocol,
         max_generated_tokens: int,
         max_tokens_per_chunk: int,
+        overlap_length_tokens: int = 0,
         model: str = "luminous-base-control",
         instruction_configs: Mapping[Language, str] = INSTRUCTION_CONFIGS,
     ) -> None:
         super().__init__()
         self._summarize = SteerableSingleChunkSummarize(
             client, model, max_generated_tokens, instruction_configs
         )
-        self._chunk_task = ChunkTask(
-            client, model=model, max_tokens_per_chunk=max_tokens_per_chunk
-        )
+        self._chunk_task: Task[ChunkInput, ChunkOutput]
+        if overlap_length_tokens == 0:
+            self._chunk_task = ChunkTask(
+                client, model=model, max_tokens_per_chunk=max_tokens_per_chunk
+            )
+        else:
+            self._chunk_task = ChunkOverlapTask(
+                client,
+                model=model,
+                max_tokens_per_chunk=max_tokens_per_chunk,
+                overlap_length_tokens=overlap_length_tokens,
+            )
 
     def do_run(
         self, input: LongContextSummarizeInput, task_span: TaskSpan