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>

cmd/bd/version.go

@@ -14,7 +14,7 @@ import (
 
 var (
 	// Version is the current version of bd (overridden by ldflags at build time)
-	Version = "0.30.1"
+	Version = "0.30.2"
 	// Build can be set via ldflags at compile time
 	Build = "dev"
 	// Commit and branch the git revision the binary was built from (optional ldflag)