feat: schema migration for users, admin_audit_log, server_sync_log tables

ISSUE:
Admin modules (Players, Grace, Audit, Servers, Roles) were failing silently
HTMX endpoints returned 500 errors because required tables didn't exist

ROOT CAUSE (per Gemini):
Modules expect users table (Identity) separate from subscriptions (Billing)
- users: discord_id, minecraft_username, minecraft_uuid, is_staff
- admin_audit_log: audit trail for Trinity actions
- server_sync_log: Pterodactyl sync tracking

SOLUTION:
Created schema migration with 3 new tables
- Preserves Identity/Billing separation (critical for whitelist sync)
- Auto-syncs existing subscriptions to users table
- Pre-populates Trinity members as staff

DEPLOYMENT:
Run on Command Center:
  cp services/arbiter-3.0/migrations/arbiter_schema_migration.sql /tmp/
  bash services/arbiter-3.0/migrations/run-migration.sh

After migration, all 5 admin modules will work correctly.

Credit: Gemini architectural guidance - Option A (create tables) vs Option B (rewrite queries)

Signed-off-by: Claude (Chronicler #57) <claude@firefrostgaming.com>

services/arbiter-3.0/migrations/arbiter_schema_migration.sql

@@ -0,0 +1,42 @@
+-- 1. Users Table (Identity mapping for Whitelist Sync)
+CREATE TABLE IF NOT EXISTS users (
+    discord_id VARCHAR(255) PRIMARY KEY,
+    minecraft_username VARCHAR(255),
+    minecraft_uuid VARCHAR(255),
+    is_staff BOOLEAN DEFAULT false,
+    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
+);
+
+-- 2. Admin Audit Log (For the Audit Module)
+CREATE TABLE IF NOT EXISTS admin_audit_log (
+    id SERIAL PRIMARY KEY,
+    admin_discord_id VARCHAR(255) NOT NULL,
+    action_type VARCHAR(100) NOT NULL,
+    target_discord_id VARCHAR(255),
+    details JSONB,
+    performed_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
+);
+
+-- 3. Server Sync Log (For the Servers Matrix Module)
+CREATE TABLE IF NOT EXISTS server_sync_log (
+    id SERIAL PRIMARY KEY,
+    server_identifier VARCHAR(100) NOT NULL,
+    sync_status VARCHAR(50) NOT NULL,
+    synced_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
+    details JSONB
+);
+
+-- Insert Trinity members with staff status
+INSERT INTO users (discord_id, minecraft_username, is_staff) 
+VALUES 
+    ('269225344572863754', 'Frostystyle', true),
+    ('219389716821444609', 'Gingerfury66', true)
+ON CONFLICT (discord_id) DO NOTHING;
+
+-- Sync existing subscriptions to users table
+INSERT INTO users (discord_id, is_staff)
+SELECT DISTINCT discord_id, false
+FROM subscriptions
+WHERE discord_id IS NOT NULL
+ON CONFLICT (discord_id) DO NOTHING;

services/arbiter-3.0/migrations/run-migration.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+# Run this on Command Center to execute the schema migration
+
+cd /opt/arbiter-3.0/src
+
+node -e "
+const db = require('./database');
+const fs = require('fs');
+
+async function migrate() {
+  try {
+    const sql = fs.readFileSync('/tmp/arbiter_schema_migration.sql', 'utf8');
+    console.log('Executing schema migration...');
+    await db.query(sql);
+    console.log('✅ Migration complete!');
+    
+    // Verify tables exist
+    const result = await db.query(\`
+      SELECT table_name 
+      FROM information_schema.tables 
+      WHERE table_schema = 'public' 
+      AND table_name IN ('users', 'admin_audit_log', 'server_sync_log')
+      ORDER BY table_name
+    \`);
+    console.log('\\n📊 Created tables:');
+    result.rows.forEach(row => console.log('  ✓', row.table_name));
+    
+    // Show user count
+    const userCount = await db.query('SELECT COUNT(*) FROM users');
+    console.log('\\n👥 Users in table:', userCount.rows[0].count);
+    
+    process.exit(0);
+  } catch (err) {
+    console.error('❌ Migration failed:', err);
+    process.exit(1);
+  }
+}
+
+migrate();
+"