feat: bound backend admission and expose running traces
Add process-wide backend execution admission without blocking UI or administrative HTTP work. Represent backend operations while they are in flight, surface running traces with immediate log links, and tie streaming admission leases to the gRPC receive lifecycle.
Assisted-by: OpenAI Codex: GPT-5
Signed-off-by: Richard Palethorpe <io@richiejp.com>
* feat(api): add POST /v1/images/upscale endpoint
Add a new image upscaling endpoint that accepts a source image and
returns an upscaled version. Supports selectable upscaler models
(e.g. realesrgan) and a configurable scale factor (2x or 4x).
- backend.proto: add UpscaleImage RPC and UpscaleImageRequest message
- pkg/grpc: implement UpscaleImage in Backend interface, client, server
and embed shim
- core/backend/upscale.go: new backend helper (mirrors ImageGeneration)
- core/http/endpoints/openai/upscale.go: new multipart/form-data handler
- core/http/routes/openai.go: register POST /v1/images/upscale
- core/http/auth/features.go: gate upscale routes under FeatureImages
- backend/python/diffusers/backend.py: implement UpscaleImage — uses
diffusers upscale pipeline when loaded, falls back to Lanczos resize
* fix(grpc): add UpscaleImage stub to Base backend
All Go backends embedding Base now satisfy the AIModel interface
without needing to implement UpscaleImage explicitly.
* fix(images): complete upscale endpoint integration
Store generated upscales under the served images directory, validate scale factors, document and advertise the endpoint, and add a functional Stable Diffusion x4 gallery model.
Assisted-by: Codex:gpt-5
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Co-authored-by: localai-org-maint-bot <306269227+localai-org-maint-bot@users.noreply.github.com>
Richard Palethorpe