Add stewardship readiness asset: docs/RELEASE_PROCESS.md

docs/RELEASE_PROCESS.md

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+# Release Process
+<!-- stewardship-standard: release-process-v1 -->
+
+## Before Tagging
+
+- Confirm the default branch builds, runs, or flashes as documented.
+- Confirm no secrets, private data, generated dependency trees, or raw binaries are accidentally committed.
+- Confirm license and upstream provenance are documented.
+- Update CHANGELOG.md.
+- Attach binaries only as release assets with SHA256 checksums and source commit references.
+
+## Release Notes
+
+Include:
+
+- Purpose of the release.
+- Commit hash or tag.
+- Build environment.
+- Known limitations.
+- Verification performed.