fix: update CivitAI model version IDs to latest versions

- RealVisXL: 904692 → 798204 (V5.0 Lightning)
- WAI-NSFW-illustrious: 1239648 → 2167369 (v15.0)
- Big Lust: 649023 → 1081768 (v1.6)

Fixes 404 errors when downloading these models.

models_civitai.yaml

@@ -67,9 +67,9 @@ model_categories:
       notes: "Most popular anime/furry model on CivitAI, supports wide range of styles"
 
     - name: realvisxl-v5
-      version_id: "904692"
+      version_id: "798204"
       model_id: "139562"
-      description: "RealVisXL V5.0 - Photorealistic model for high-quality realistic images"
+      description: "RealVisXL V5.0 Lightning - Photorealistic model for high-quality realistic images"
       size_gb: 6.8
       essential: true
       type: checkpoints
@@ -78,11 +78,11 @@ model_categories:
       vram_gb: 12
       tags: [nsfw, realistic, photorealistic, professional]
       recommended_settings:
-        sampler: "DPM++ SDE Karras (30+ steps) or DPM++ 2M Karras (50+ steps)"
-      notes: "Excellent for photorealistic portraits and scenes, both SFW and NSFW"
+        sampler: "DPM++ SDE Karras (4-6 steps for Lightning)"
+      notes: "Excellent for photorealistic portraits and scenes, both SFW and NSFW. Lightning version for faster generation."
 
     - name: wai-nsfw-illustrious-sdxl
-      version_id: "1239648"
+      version_id: "2167369"
       model_id: "827184"
       description: "WAI-NSFW-illustrious-SDXL v15.0 - Actively updated NSFW Illustrious variant"
       size_gb: 6.5
@@ -92,7 +92,7 @@ model_categories:
       base_model: SDXL 1.0
       vram_gb: 12
       tags: [nsfw, anime, illustrious, artistic]
-      notes: "Latest version from October 2025, frequently updated"
+      notes: "Latest version from November 2025, frequently updated"
 
     - name: talmendoxl
       version_id: "131869"
@@ -108,7 +108,7 @@ model_categories:
       notes: "Known for high-quality photorealistic NSFW content"
 
     - name: big-lust-v1-6
-      version_id: "649023"
+      version_id: "1081768"
       model_id: "575395"
       description: "Big Lust v1.6 - SDXL NSFW checkpoint"
       size_gb: 6.5