feat(0049k): graph_explorer wiring + close issue 0049

- cpp/CMakeLists.txt: register projects/osint_graph/apps/graph_explorer/
  via add_subdirectory pattern (igual que registry_dashboard).
- dev/feature_flags.json: osint_graph_v1 = true (enabled_at 2026-04-30).
- dev/issues/{0049,0049k} → dev/issues/completed/. README index actualizado.

La app vive en su sub-repo dataforge/graph_explorer (push hecho al cerrar).

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

dev/feature_flags.json

@@ -5,9 +5,10 @@
     "description": "Sistema propio de orquestacion de DAGs para reemplazar Dagu. Incluye parser YAML, executor con paralelismo, process manager, execution store SQLite, scheduler cron, CLI y web frontend."
   },
   "osint_graph_v1": {
-    "enabled": false,
+    "enabled": true,
     "issue": "0049",
     "description": "Visor de grafos GPU-accelerated agnostico del backend (graph_explorer en projects/osint_graph) + sistema de renderer extendido (shapes, iconos Tabler, edge styles, flechas, layouts force-GPU/radial/hierarchical, labels con politica). Activado al cerrar 0049k.",
-    "added": "2026-04-29"
+    "added": "2026-04-29",
+    "enabled_at": "2026-04-30"
   }
 }

dev/issues/README.md

@@ -54,7 +54,7 @@
 | [0046](completed/0046-cpp-refactor-raw-imgui.md) | Reemplazar raw ImGui en apps por primitivos del registry | completado | media | refactor | — |
 | [0047](completed/0047-cpp-tests-foundation.md) | C++ tests foundation (Catch2 + top-20 primitivos) | completado | alta | feature | 0048 |
 | [0048](completed/0048-cpp-visual-tests-ci-gate.md) | Visual tests via primitives_gallery + CI gate tested:true | completado | media | feature | — |
-| [0049](0049-osint-graph-viewer.md) | OSINT graph viewer + GPU graph rendering system (multi-issue) | pendiente | alta | feature | — |
+| [0049](completed/0049-osint-graph-viewer.md) | OSINT graph viewer + GPU graph rendering system (multi-issue) | completado | alta | feature | — |
 | [0049a](completed/0049a-osint-graph-setup.md) | Setup proyecto osint_graph + sub-repo graph_explorer | completado | alta | infra | parte de 0049 |
 | [0049b](completed/0049b-cpp-bump-gl-43.md) | Bump OpenGL 3.3 → 4.3 core en cpp/framework | completado | alta | infra | parte de 0049 |
 | [0049c](completed/0049c-graph-renderer-tier1.md) | graph_renderer Tier 1: RGBA8, orphan, frustum cull, auto-pause | completado | alta | perf | parte de 0049 |
@@ -65,4 +65,4 @@
 | [0049h](completed/0049h-graph-force-layout-gpu.md) | graph_force_layout_gpu: compute shader + spatial hash | completado | media-alta | feature | parte de 0049 |
 | [0049i](completed/0049i-graph-layouts-static.md) | graph_layouts (radial/hierarchical/fixed) + viewport multi-select | completado | media | feature | parte de 0049 |
 | [0049j](completed/0049j-graph-labels.md) | graph_labels: render etiquetas con LabelPolicy | completado | media | feature | parte de 0049 |
-| [0049k](0049k-graph-explorer-app.md) | App graph_explorer (proyecto osint_graph) — integracion final | pendiente | alta | feature | parte de 0049 |
+| [0049k](completed/0049k-graph-explorer-app.md) | App graph_explorer (proyecto osint_graph) — integracion final | completado | alta | feature | parte de 0049 |