chore(image-resize): bump iii-sdk to =0.12.0-next.1 and clean up legacy files

[andersonleal]

Summary

• Bump iii-sdk =0.11.3 → =0.12.0-next.1 (latest published pre-release on crates.io). Worker version 0.1.3 → 0.1.4. The channel API used by this worker (register_function_with, ChannelReader/Writer, StreamChannelRef, extract_channel_refs, IIIError) is unchanged in 0.12.0-next.1, so handler/processing code is untouched.
• Clean up files orphaned by the engine-side protocol-manifest removal: src/manifest.rs, build.rs (its only consumer was the deleted manifest module), the --manifest CLI flag in main.rs, and the matching Dockerfile lines that copied build.rs, ran cargo run -- --manifest > worker.yaml, and copied the unproduced worker.yaml into the runtime image.
• Drop legacy image-resize/iii.toml. The engine reads iii.toml at the engine's working directory, not at the worker source tree (motia/engine/src/workers/external.rs:120, tagged "legacy" in engine/src/workers/config.rs:194,231). No other worker in this repo carries one.
• Reformat config.yaml to the flat schema. The engine writes only the inner workers[].config payload to a temp YAML and passes its path via --config (engine/src/workers/external.rs:225-258). The previous envelope form silently failed to parse and main.rs fell back to defaults that happened to match the file's values.

Net diff

```
8 files changed, 11 insertions(+), 102 deletions(-)
image-resize/Cargo.lock | 6 ++---
image-resize/Cargo.toml | 4 +--
image-resize/Dockerfile | 4 ---
image-resize/build.rs | 6 ----- (deleted)
image-resize/config.yaml | 17 +++++-------
image-resize/iii.toml | 2 -- (deleted)
image-resize/src/main.rs | 11 --------
image-resize/src/manifest.rs | 63 -------- (deleted)
```

No source changes to handler, processing, or config logic.

Test plan

• `cargo build` — clean
• `cargo test` — 58/58 pass
• `cargo clippy --all-targets -- -D warnings` — no findings
• `cargo fmt --all -- --check` — formatted
• `Cargo.lock` resolves `iii-sdk 0.12.0-next.1`
• Container build (`docker build` / CI) succeeds end-to-end after `build.rs` and `--manifest` removal
• Runtime smoke: engine spawns the worker, hands it a flat-schema `--config` temp file, an HTTP/channel resize completes successfully and produces the expected output thumbnail

Summary by CodeRabbit

Release Notes

• Chores

  • Bumped image-resize to version 0.1.4
  • Updated to SDK version 0.12.0-next.1

• Refactor

  • Simplified configuration structure to use flat YAML format
  • Removed --manifest CLI option

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 6f51072f-b108-4f01-b359-90aa30d7950e

📥 Commits

Reviewing files that changed from the base of the PR and between f539a7c and 4b80872.

⛔ Files ignored due to path filters (1)

• image-resize/Cargo.lock is excluded by !**/*.lock

📒 Files selected for processing (7)

• image-resize/Cargo.toml
• image-resize/Dockerfile
• image-resize/build.rs
• image-resize/config.yaml
• image-resize/iii.toml
• image-resize/src/main.rs
• image-resize/src/manifest.rs

💤 Files with no reviewable changes (5)

• image-resize/Dockerfile
• image-resize/build.rs
• image-resize/iii.toml
• image-resize/src/main.rs
• image-resize/src/manifest.rs

---

📝 Walkthrough

Walkthrough

The pull request removes the manifest generation infrastructure from the image-resize worker crate, updates dependencies to iii-sdk 0.12.0-next.1, restructures the configuration from nested to top-level keys, and bumps the crate version to 0.1.4.

Changes

Cohort / File(s)	Summary
Dependency & Version Updates image-resize/Cargo.toml	Bumped image-resize crate version from 0.1.3 to 0.1.4 and updated iii-sdk dependency pin from 0.11.3 to 0.12.0-next.1.
Manifest Generation Removal image-resize/build.rs, image-resize/src/manifest.rs, image-resize/src/main.rs	Deleted build script, removed manifest.rs module with ModuleManifest struct and build_manifest() function, and removed --manifest CLI flag along with its associated control flow from main.
Configuration Restructuring image-resize/config.yaml, image-resize/iii.toml	Simplified config.yaml from nested workers[].config structure to root-level keys; removed image-resize worker version pin from iii.toml.
Docker Build Process image-resize/Dockerfile	Removed build.rs execution step and eliminated the copying of generated worker.yaml artifact into the final image.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Possibly related PRs

• feat: add sandbox worker support with multi-arch Docker builds #6: Inverse relationship — adds multi-arch Dockerfile and build-time manifest generation that depends on build.rs and manifest artifacts that this PR removes.
• feat: add iii-mcp and iii-a2a protocol workers #4: Modifies image-resize/src/manifest.rs test assertions while this PR deletes the entire file.
• chore: bump iii-sdk to 0.11.3 across all workers #33: Also updates the iii-sdk dependency pin in image-resize/Cargo.toml.

Suggested reviewers

• sergiofilhowz
• ytallo

---

🐰 Manifest generation hops away,
Build scripts take their final day,
Config files now stand proud and clean,
Simplest structure ever seen—
Version bumped, SDK renewed, hooray!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main changes: bumping the iii-sdk dependency to a new version and cleaning up legacy files (build.rs, manifest.rs, --manifest flag, iii.toml, and Dockerfile updates).
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/image-resize-sdk-0.12.0-next.1

---

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