chore: bump version to 0.30.2

- Update version in version.go, default.nix, hook templates
- Add CHANGELOG.md entry for v0.30.2
- Add v0.30.1 and v0.30.2 to versionChanges in info.go
- Remove stale internal/deletions import from integration test
  (fixes CI failure from bd-fom refactor)

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

default.nix

@@ -1,7 +1,7 @@
 { pkgs, self }:
 pkgs.buildGoModule {
   pname = "beads";
-  version = "0.24.4";
+  version = "0.30.2";
 
   src = self;