feat: publish the Sandwich Hime source preview

Signed-off-by: Cole Speelman <gamertan@noreply.localhost>

CHANGELOG.md

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+<!-- SPDX-License-Identifier: AGPL-3.0-only -->
+
+# Changelog
+
+Sandwich Hime follows semantic versioning after v1. Compiler and nested runtime releases are listed separately.
+
+## Unreleased — v1 proof
+
+### Added
+
+- Typed one-component `.sando` language and explicit `<?sando go` target.
+- Context-annotated renderer IR with deterministic, atomic Go generation.
+- Read-only stale-output checking and structured diagnostics.
+- Independent Apache-2.0 `sando` component/runtime ABI.
+- Loopback-only last-good development supervisor with SSE reload and diagnostic overlay.
+- Synthetic EQL-shaped proof fixture and production pilot plan.
+- Multi-license, security, governance, trademark, AI contribution, and release policies.
+
+### Removed
+
+- Unpublished `.go.hime` syntax and 2025 generated API.
+- Injected helper directories, nested demo modules, Go plugins, and manually repaired generated output.
+- Placeholder novelty commands that did not perform project work.
+
+Private prototype history is intentionally outside the sanitized public repository. The public changelog begins with the pre-1.0 source preview.