feat(cybersecurity): 8 IoC regex extractors + extract_iocs pipeline puro

Extractores nuevos en python/functions/cybersecurity/:
- extract_ip_addresses (IPv4 + IPv6 con validacion ipaddress)
- extract_emails (RFC 5322 simplificado)
- extract_domains (FQDNs con TLD valido, lista estatica)
- extract_file_hashes (MD5/SHA1/SHA256/SHA512, algoritmo por longitud)
- extract_crypto_wallets (BTC legacy + bech32, ETH 0x+40hex)
- extract_cve_ids (CVE-YYYY-NNNN+)
- extract_mac_addresses (xx:xx:xx + xx-xx-xx, separador uniforme)
- extract_phone_numbers (E.164 + ES local 9 digitos)

Pipeline:
- extract_iocs corre todos, deduplica spans contenidos. Mantiene
  purity:pure (kind:function con uses_functions no vacio) porque la
  regla del registry exige que los pipelines sean impuros.

Todas devuelven list[dict] con value/start/end/type para que el
caller (issues 0038-0040) pueda reconciliar offsets con spans NER
sin reparsing.

Refs #0037

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

python/functions/cybersecurity/extract_ip_addresses.md

@@ -0,0 +1,45 @@
+---
+name: extract_ip_addresses
+kind: function
+lang: py
+domain: cybersecurity
+version: "1.0.0"
+purity: pure
+signature: "def extract_ip_addresses(text: str) -> list[dict]"
+description: "Extrae direcciones IPv4 e IPv6 validas de un texto, con offsets start/end. Filtra candidatos invalidos via ipaddress (rechaza 999.999.999.999 y similares). No distingue privadas de publicas — el filtrado de relevancia es del caller."
+tags: [ioc, ip, ipv4, ipv6, regex, extract, cybersecurity, python]
+uses_functions: []
+uses_types: []
+returns: []
+returns_optional: false
+error_type: ""
+imports: [re, ipaddress]
+params:
+  - name: text
+    desc: "string de texto del que extraer IPs"
+output: "lista de dicts con {value, start, end, type='ip_address'} por cada IP encontrada"
+tested: true
+tests:
+  - "IPv4 valida y rangos limite"
+  - "IPv4 invalida (>255 octeto) descartada"
+  - "IPv6 forma completa y comprimida"
+  - "IPv6 invalida descartada"
+  - "Texto sin IPs"
+test_file_path: "python/functions/cybersecurity/tests/test_extract_iocs.py"
+file_path: "python/functions/cybersecurity/extract_ip_addresses.py"
+---
+
+## Ejemplo
+
+```python
+extract_ip_addresses("Server 192.168.1.1 talks to 8.8.8.8")
+# [{"value": "192.168.1.1", "start": 7, "end": 18, "type": "ip_address"},
+#  {"value": "8.8.8.8", "start": 28, "end": 35, "type": "ip_address"}]
+
+extract_ip_addresses("not an IP: 999.999.999.999")
+# []
+```
+
+## Notas
+
+Usa `ipaddress.IPv4Address` / `IPv6Address` para validacion estructural — descarta `999.999.999.999` y otras combinaciones sintacticamente plausibles pero invalidas. IPs privadas (10/8, 172.16/12, 192.168/16) se extraen igual; el filtrado de relevancia es responsabilidad del caller. Pure — solo regex compilado y `ipaddress`, sin red ni disco.