fix(dolt): add ID generation to transaction CreateIssue

The doltTransaction.CreateIssue method was missing ID generation logic
that exists in the SQLite transaction implementation. When issues were
created within a transaction with empty IDs (like during wisp creation),
they would all get empty string "" as the primary key, causing
"duplicate primary key given: []" errors.

This fix adds the same ID generation logic from SQLite transaction:
- Get config prefix from database
- Apply IDPrefix/PrefixOverride to determine effective prefix
- Generate hash-based ID using generateIssueID

Fixes wisp creation failures across all rigs running Dolt server mode.

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

internal/storage/dolt/transaction.go

@@ -60,6 +60,33 @@ func (t *doltTransaction) CreateIssue(ctx context.Context, issue *types.Issue, a
 		issue.ContentHash = issue.ComputeContentHash()
 	}
 
+	// Generate ID if not provided (critical for wisp creation)
+	if issue.ID == "" {
+		// Get prefix from config
+		var configPrefix string
+		err := t.tx.QueryRowContext(ctx, "SELECT value FROM config WHERE `key` = ?", "issue_prefix").Scan(&configPrefix)
+		if err == sql.ErrNoRows || configPrefix == "" {
+			return fmt.Errorf("database not initialized: issue_prefix config is missing")
+		} else if err != nil {
+			return fmt.Errorf("failed to get config: %w", err)
+		}
+
+		// Determine effective prefix
+		prefix := configPrefix
+		if issue.PrefixOverride != "" {
+			prefix = issue.PrefixOverride
+		} else if issue.IDPrefix != "" {
+			prefix = configPrefix + "-" + issue.IDPrefix
+		}
+
+		// Generate ID
+		generatedID, err := generateIssueID(ctx, t.tx, prefix, issue, actor)
+		if err != nil {
+			return fmt.Errorf("failed to generate issue ID: %w", err)
+		}
+		issue.ID = generatedID
+	}
+
 	return insertIssueTx(ctx, t.tx, issue)
 }