add release skills, backfill changelog, wire CI to use changelog for GitHub releases

- Backfill CHANGELOG.md from all 17 GitHub releases (was stale at v0.1.0)
- Add draft-release-notes and release-bump agent skills
- Extract release notes from CHANGELOG.md in release CI instead of hardcoded placeholder
- Remove stale PATCH_NOTES.md, mlx-test/, move PROJECT_STATUS to docs/notes
- Reorganize API reference docs from unknown/ to named groups
- Update openapi.json

docs/content/docs/api-reference/general/meta.json

@@ -0,0 +1,4 @@
+{
+  "title": "General",
+  "pages": ["root__get", "health_health_get"]
+}

docs/content/docs/api-reference/generation/meta.json

@@ -0,0 +1,8 @@
+{
+  "title": "Generation",
+  "pages": [
+    "generate_speech_generate_post",
+    "transcribe_audio_transcribe_post",
+    "get_audio_audio__generation_id__get"
+  ]
+}

docs/content/docs/api-reference/history/meta.json

@@ -0,0 +1,9 @@
+{
+  "title": "History",
+  "pages": [
+    "list_history_history_get",
+    "get_generation_history__generation_id__get",
+    "delete_generation_history__generation_id__delete",
+    "get_stats_history_stats_get"
+  ]
+}

docs/content/docs/api-reference/meta.json

@@ -1,5 +1,5 @@
 {
   "title": "API Reference",
   "defaultOpen": true,
-  "pages": ["unknown"]
+  "pages": ["general", "profiles", "generation", "history", "models"]
 }

docs/content/docs/api-reference/models/meta.json

@@ -0,0 +1,10 @@
+{
+  "title": "Models",
+  "pages": [
+    "get_model_status_models_status_get",
+    "load_model_models_load_post",
+    "unload_model_models_unload_post",
+    "trigger_model_download_models_download_post",
+    "get_model_progress_models_progress__model_name__get"
+  ]
+}

docs/content/docs/api-reference/profiles/meta.json

@@ -0,0 +1,13 @@
+{
+  "title": "Profiles",
+  "pages": [
+    "list_profiles_profiles_get",
+    "create_profile_profiles_post",
+    "get_profile_profiles__profile_id__get",
+    "update_profile_profiles__profile_id__put",
+    "delete_profile_profiles__profile_id__delete",
+    "get_profile_samples_profiles__profile_id__samples_get",
+    "add_profile_sample_profiles__profile_id__samples_post",
+    "delete_profile_sample_profiles_samples__sample_id__delete"
+  ]
+}

docs/content/docs/api-reference/unknown/meta.json

@@ -1,27 +0,0 @@
-{
-  "title": "Endpoints",
-  "pages": [
-    "root__get",
-    "health_health_get",
-    "list_profiles_profiles_get",
-    "create_profile_profiles_post",
-    "get_profile_profiles__profile_id__get",
-    "update_profile_profiles__profile_id__put",
-    "delete_profile_profiles__profile_id__delete",
-    "add_profile_sample_profiles__profile_id__samples_post",
-    "get_profile_samples_profiles__profile_id__samples_get",
-    "delete_profile_sample_profiles_samples__sample_id__delete",
-    "generate_speech_generate_post",
-    "list_history_history_get",
-    "get_generation_history__generation_id__get",
-    "delete_generation_history__generation_id__delete",
-    "get_stats_history_stats_get",
-    "transcribe_audio_transcribe_post",
-    "get_audio_audio__generation_id__get",
-    "load_model_models_load_post",
-    "unload_model_models_unload_post",
-    "get_model_progress_models_progress__model_name__get",
-    "get_model_status_models_status_get",
-    "trigger_model_download_models_download_post"
-  ]
-}