perf(cli): skip RDS/self-managed steps in Supabase mode

Supabase is neither RDS nor self-managed, so skip these steps
entirely rather than attempting and failing:
- 03.optional_rds (rds_tools extension, etc.)
- 04.optional_self_managed (pg_stat_file, pg_ls_dir, etc.)

This reduces unnecessary API calls and speeds up the command.

Author: claude

cli/bin/postgres-ai.ts

@@ -854,9 +854,14 @@ program
           includeOptionalPermissions,
         });
 
+        // For Supabase mode, skip RDS and self-managed steps (they don't apply)
+        const supabaseApplicableSteps = plan.steps.filter(
+          (s) => s.name !== "03.optional_rds" && s.name !== "04.optional_self_managed"
+        );
+
         const effectivePlan = opts.resetPassword
-          ? { ...plan, steps: plan.steps.filter((s) => s.name === "01.role") }
-          : plan;
+          ? { ...plan, steps: supabaseApplicableSteps.filter((s) => s.name === "01.role") }
+          : { ...plan, steps: supabaseApplicableSteps };
 
         if (shouldPrintSql) {
           console.log("\n--- SQL plan ---");