refactor: shorten model and table prefixes

backend/internal/models/legacy_tables.go

@@ -0,0 +1,48 @@
+package models
+
+import (
+	"fmt"
+
+	"gorm.io/gorm"
+)
+
+var legacyTableRenames = []struct {
+	legacy  string
+	current string
+}{
+	{legacy: "senlin_agent_schema_migrations", current: "sa_schema_migrations"},
+	{legacy: "senlin_agent_users", current: "sa_users"},
+	{legacy: "senlin_agent_projects", current: "sa_projects"},
+	{legacy: "senlin_agent_inbox_items", current: "sa_inbox_items"},
+	{legacy: "senlin_agent_inbox_suggestions", current: "sa_inbox_suggestions"},
+	{legacy: "senlin_agent_tasks", current: "sa_tasks"},
+	{legacy: "senlin_agent_notes", current: "sa_notes"},
+	{legacy: "senlin_agent_sources", current: "sa_sources"},
+	{legacy: "senlin_agent_ai_expert_categories", current: "sa_ai_expert_categories"},
+	{legacy: "senlin_agent_ai_experts", current: "sa_ai_experts"},
+	{legacy: "senlin_agent_ai_sessions", current: "sa_ai_sessions"},
+	{legacy: "senlin_agent_tags", current: "sa_tags"},
+	{legacy: "senlin_agent_project_channels", current: "sa_project_channels"},
+	{legacy: "senlin_agent_cron_plans", current: "sa_cron_plans"},
+	{legacy: "senlin_agent_project_events", current: "sa_project_events"},
+	{legacy: "senlin_agent_ai_keys", current: "sa_ai_keys"},
+	{legacy: "senlin_agent_ai_call_logs", current: "sa_ai_call_logs"},
+	{legacy: "senlin_agent_ai_rate_buckets", current: "sa_ai_rate_buckets"},
+	{legacy: "senlin_agent_task_shares", current: "sa_task_shares"},
+}
+
+func renameLegacyTables(database *gorm.DB) error {
+	migrator := database.Migrator()
+	for _, table := range legacyTableRenames {
+		if !migrator.HasTable(table.legacy) {
+			continue
+		}
+		if migrator.HasTable(table.current) {
+			return fmt.Errorf("cannot rename legacy table %s: target table %s already exists", table.legacy, table.current)
+		}
+		if err := migrator.RenameTable(table.legacy, table.current); err != nil {
+			return fmt.Errorf("rename legacy table %s to %s: %w", table.legacy, table.current, err)
+		}
+	}
+	return nil
+}