Add optimized workflow section

optimized/README.md

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+# Optimized Workflows
+
+This section is the maintained layer for "best current" master workflows.
+
+The `models/` tree stores collected originals and community finds.
+
+The `optimized/` tree stores the cleaned-up workflows built from analyzing what we have collected.
+
+## Purpose
+
+These workflows are intended to become the practical default choices for each category after comparing:
+
+- official workflows
+- community workflows
+- custom-node variants
+- model-specific optimizations
+- quality vs speed tradeoffs
+
+## Categories
+
+- `text-to-image/`
+- `image-edit/`
+- `image-to-video/`
+- `text-to-video/`
+- `upscale-restoration/`
+
+## Workflow format
+
+Each optimized workflow should have its own folder and usually include:
+
+- `workflow.json` or another portable Comfy workflow asset
+- `README.md`
+- optional notes, screenshots, or benchmark artifacts
+
+## Update policy
+
+This section is reviewed on a Sunday-evening cadence.
+
+The weekly review should:
+
+- inspect newly collected workflows
+- decide whether a category master should be created or updated
+- document what changed and why
+- commit and push changes before reporting back