docs(issues): cerrar 0038 — GLiNER entity extractor

- Move dev/issues/0038-gliner-entity-extractor.md a completed/
- Update README link y estado a completado

Closes #0038

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

dev/issues/README.md

@@ -43,7 +43,7 @@
 | [0035](0035-cpp-map-tiles.md) | C++ map_tiles (slippy map OSM) | pendiente | baja | feature | — |
 | [0036](0036-cpp-image-canvas-webcam.md) | C++ image_canvas + webcam_texture | pendiente | baja | feature | — |
 | [0037](completed/0037-ioc-regex-extractor.md) | IoC regex extractor (IP, email, dominio, hash, wallet, CVE, MAC) | completado | alta | feature | — |
-| [0038](0038-gliner-entity-extractor.md) | GLiNER entity extractor (zero-shot NER multilingue) | pendiente | alta | feature | 0039, 0040 |
+| [0038](completed/0038-gliner-entity-extractor.md) | GLiNER entity extractor (zero-shot NER multilingue) | completado | alta | feature | 0039, 0040 |
 | [0039](0039-glirel-relation-extractor.md) | GLiREL relation extractor (zero-shot triplets) | pendiente | media | feature | 0040 |
 | [0040](0040-hybrid-extraction-pipeline.md) | Pipeline hibrido extraccion grafos (regex + GLiNER + GLiREL + LLM fallback) | pendiente | media | feature | — |
 | [0041](completed/0041-cpp-app-best-practices.md) | C++ app shell estandarizado (PATTERNS.md + AppConfig extendido) | completado | alta | feature | 0043 |