First commit

.env

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+# OpenRouter API Configuration
+OPENROUTER_API_KEY=
+
+# Optional: Override default models
+# EXTRACTION_MODEL=google/gemma-2-9b-it:free
+# BACKUP_MODEL=meta-llama/llama-3.1-8b-instruct:free
+
+# Optional: Adjust processing limits
+# CHUNK_SIZE=2000
+# CHUNK_OVERLAP=200
+# MAX_FILE_SIZE_MB=10
+# MAX_ENTITIES=100
+# MAX_RELATIONSHIPS=200
+# ENTITY_IMPORTANCE_THRESHOLD=0.3