docs: link prior releases in CHANGELOG for continuity

The Changesets-generated CHANGELOG starts at 0.1.3; add short sections pointing
to the 0.1.0-0.1.2 pipeline-validation builds and to the pre-changelog releases
(v0.0.4 and earlier) on GitHub Releases, so the history reads continuously.

Author: cevheri

CHANGELOG.md

@@ -51,3 +51,15 @@
   The adapter takes an already-open handle (acquisition is async and the caller's),
   keeping `open` synchronous. The new `SyncAccessHandle` type names the handle
   shape the adapter needs, so the package depends on no DOM lib types.
+
+## 0.1.0 - 0.1.2
+
+Builds published while validating the multi-channel release pipeline (npm, JSR,
+GitHub Releases, GHCR, Docker Hub) end to end; superseded by 0.1.3.
+
+## 0.0.4 and earlier
+
+Released before this changelog was generated by Changesets. See the GitHub
+Releases for their notes — e.g.
+[v0.0.4](https://github.com/libredb/libredb-database/releases/tag/v0.0.4) and
+[earlier](https://github.com/libredb/libredb-database/releases).