fix: Remove redundant prompt text to reduce token usage

Consolidate 'using these exact IDs (0 through N-1)' with following sentence
to eliminate repetition. Changes:
- 'using these exact IDs (0 through {N-1}). Do not skip IDs or use IDs outside this range'
- 'with IDs 0 through {N-1}. Do not skip or add IDs'

Saves ~15 tokens per deduplication call.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

graphiti_core/prompts/dedupe_nodes.py

@@ -167,7 +167,7 @@ def nodes(context: dict[str, Any]) -> list[Message]:
 
         Task:
         ENTITIES contains {len(context['extracted_nodes'])} entities with IDs 0 through {len(context['extracted_nodes']) - 1}.
-        Your response MUST include EXACTLY {len(context['extracted_nodes'])} resolutions using these exact IDs (0 through {len(context['extracted_nodes']) - 1}). Do not skip IDs or use IDs outside this range.
+        Your response MUST include EXACTLY {len(context['extracted_nodes'])} resolutions with IDs 0 through {len(context['extracted_nodes']) - 1}. Do not skip or add IDs.
 
         For every entity, return an object with the following keys:
         {{