feat: funciones Python datascience, finance, cybersecurity y pipelines

Datascience: aggregate_by_group, deduplicate_entities/relations, detect_drift,
diff_entities/relations, extract_entities/relations_llm, hotness_score, melt,
merge_graphs, pivot, build_entity/relation_schema_prompt.
Finance: avellaneda_stoikov_quotes, generate_gbm_prices, generate_taker_order,
hawkes_intensity + módulo finance.py.
Cybersecurity: envelope_encrypt/decrypt + módulo cybersecurity.py.
Pipelines: extraction_pipeline, monte_carlo_market, run_market_sim.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

python/functions/datascience/build_relation_schema_prompt.md

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+---
+name: build_relation_schema_prompt
+kind: function
+lang: py
+domain: datascience
+version: "1.0.0"
+purity: pure
+signature: "def build_relation_schema_prompt(relation_types: list[str]) -> str"
+description: "Genera la seccion del system prompt con los tipos de relacion permitidos para extraccion. Formatea la lista de tipos en texto legible para el LLM."
+tags: [prompt, llm, relation, schema, osint, graph, extraction]
+uses_functions: []
+uses_types: []
+returns: []
+returns_optional: false
+error_type: ""
+imports: []
+tested: true
+tests:
+  - "lista con varios tipos"
+  - "lista vacia retorna string vacio"
+  - "un solo tipo"
+test_file_path: "python/functions/datascience/build_relation_schema_prompt_test.py"
+file_path: "python/functions/datascience/build_relation_schema_prompt.py"
+---
+
+## Ejemplo
+
+```python
+from build_relation_schema_prompt import build_relation_schema_prompt
+
+types = ["funds", "employs", "communicates_with", "owns"]
+prompt = build_relation_schema_prompt(types)
+# Allowed relation types:
+# funds, employs, communicates_with, owns
+```
+
+## Notas
+
+Funcion pura. No requiere dependencias externas.
+
+La salida es una sola linea con todos los tipos separados por coma, precedida por el encabezado. El formato es minimal para no consumir tokens innecesarios del contexto del LLM.
+
+Pensada para componer con `build_entity_schema_prompt` al construir el system prompt completo de extraccion de grafos OSINT.