feat: add SSH backup locations with --backup flagv0.2.0

- Add support for SSH backup locations (e.g., paul@server:git/)
- Backup locations are one-way only (push only, never pull)
- Automatic bare repository creation on SSH servers
- Add --backup flag to opt-in to backup syncing
- Backup locations are disabled by default for offline resilience
- Update version to 0.2.0

This allows users to maintain private backups on home servers that may
be offline without affecting regular sync operations.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

1 files changed, 6 insertions, 2 deletions

diff --git a/internal/sync/branch_sync.go b/internal/sync/branch_sync.go
index 1bf8b79..02f8964 100644
--- a/internal/sync/branch_sync.go
+++ b/internal/sync/branch_sync.go
@@ -10,7 +10,11 @@ import (
 func (s *Syncer) trackRemotesWithBranch(branch string, remotes map[string]*config.Organization) map[string]bool {
 	remotesWithBranch := make(map[string]bool)
 	
-	for remoteName := range remotes {
+	for remoteName, org := range remotes {
+		// Skip checking backup locations as we don't sync from them
+		if org.BackupLocation {
+			continue
+		}
 		if s.remoteBranchExists(remoteName, branch) {
 			remotesWithBranch[remoteName] = true
 		}
@@ -48,7 +52,7 @@ func pushToAllRemotes(branch string, remotes map[string]*config.Organization, re
 			fmt.Printf("  Pushing to %s (%s)...\n", remoteName, org.Host)
 		}
 
-		if err := pushBranch(remoteName, branch, remoteHasBranch); err != nil {
+		if err := pushBranchWithBackupSupport(remoteName, branch, remoteHasBranch, org); err != nil {
 			return err
 		}
 	}