docs(services): add Ollama iGPU (Radeon 780M / ROCm) entry

- Document ollama migrated to Dockge stack on ollama/ollama:rocm with
  gfx1103 enablement (HSA_OVERRIDE_GFX_VERSION=11.0.0, OLLAMA_IGPU_ENABLE=1)
- Verified Ornith 1.0 9B runs 100% on the 780M iGPU (~11 tok/s)
- CHANGELOG entry for 2026-06-29
- (also includes previously-uncommitted Development services section
  already present in the working tree)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

docs/CHANGELOG.md

@@ -2,6 +2,14 @@
 
 **Purpose:** Major infrastructure events only. Minor changes are in git commit messages.
 
+---
+## 2026-06-29
+
+### Ollama GPU acceleration on Radeon 780M iGPU
+- **[OLLAMA]** Migrated ollama from Unraid `dockerman` template (CPU image, no devices) to a Dockge stack using `ollama/ollama:rocm`
+- **[OLLAMA]** Enabled AMD Radeon 780M (gfx1103) ROCm offload via `HSA_OVERRIDE_GFX_VERSION=11.0.0` + `OLLAMA_IGPU_ENABLE=1`, passing `/dev/kfd` and `/dev/dri`
+- **[OLLAMA]** Verified Ornith 1.0 9B GGUF runs 100% on GPU (33/33 layers), ~11 tok/s; iGPU is RAM-bandwidth bound
+
 ---
 ## 2026-05-05