feat: add telegram-cli web chat interface and /api/chat endpoint

- Add telegram-cli Worker with web chat UI for browser-based bot testing
- Add POST /api/chat authenticated endpoint (Bearer token, production enabled)
- Fix ENVIRONMENT to production in wrangler.toml (was blocking Service Binding)
- Add Service Binding (BOT_WORKER) for Worker-to-Worker communication
- Add cloud-db-schema.sql for local development

telegram-cli features:
- Web UI at GET / with dark theme
- JSON API at POST /api/chat
- Service Binding to telegram-summary-bot Worker

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

migrations/cloud-db-schema.sql

@@ -0,0 +1,97 @@
+-- CLOUD_DB Schema for local development
+-- Auto-generated from production
+
+CREATE TABLE IF NOT EXISTS providers (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  name TEXT NOT NULL UNIQUE,
+  display_name TEXT NOT NULL,
+  api_base_url TEXT,
+  last_sync_at TEXT,
+  sync_status TEXT NOT NULL DEFAULT 'pending' CHECK (sync_status IN ('pending', 'syncing', 'success', 'error')),
+  sync_error TEXT,
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
+CREATE TABLE IF NOT EXISTS regions (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  provider_id INTEGER NOT NULL,
+  region_code TEXT NOT NULL,
+  region_name TEXT NOT NULL,
+  country_code TEXT,
+  latitude REAL,
+  longitude REAL,
+  available INTEGER NOT NULL DEFAULT 1,
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT (datetime('now')),
+  FOREIGN KEY (provider_id) REFERENCES providers(id) ON DELETE CASCADE,
+  UNIQUE(provider_id, region_code)
+);
+
+CREATE TABLE IF NOT EXISTS instance_types (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  provider_id INTEGER NOT NULL,
+  instance_id TEXT NOT NULL,
+  instance_name TEXT NOT NULL,
+  vcpu INTEGER NOT NULL,
+  memory_mb INTEGER NOT NULL,
+  storage_gb INTEGER NOT NULL,
+  transfer_tb REAL,
+  network_speed_gbps REAL,
+  gpu_count INTEGER DEFAULT 0,
+  gpu_type TEXT,
+  instance_family TEXT CHECK (instance_family IN ('general', 'compute', 'memory', 'storage', 'gpu')),
+  metadata TEXT,
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT (datetime('now')),
+  FOREIGN KEY (provider_id) REFERENCES providers(id) ON DELETE CASCADE,
+  UNIQUE(provider_id, instance_id)
+);
+
+CREATE TABLE IF NOT EXISTS pricing (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  instance_type_id INTEGER NOT NULL,
+  region_id INTEGER NOT NULL,
+  hourly_price REAL NOT NULL,
+  monthly_price REAL NOT NULL,
+  currency TEXT NOT NULL DEFAULT 'USD',
+  available INTEGER NOT NULL DEFAULT 1,
+  created_at TEXT NOT NULL DEFAULT (datetime('now')),
+  updated_at TEXT NOT NULL DEFAULT (datetime('now')),
+  hourly_price_krw REAL,
+  monthly_price_krw REAL,
+  hourly_price_retail REAL,
+  monthly_price_retail REAL,
+  FOREIGN KEY (instance_type_id) REFERENCES instance_types(id) ON DELETE CASCADE,
+  FOREIGN KEY (region_id) REFERENCES regions(id) ON DELETE CASCADE,
+  UNIQUE(instance_type_id, region_id)
+);
+
+-- Seed test data
+INSERT OR IGNORE INTO providers (id, name, display_name, api_base_url, sync_status) VALUES
+  (1, 'linode', 'Linode (Akamai)', 'https://api.linode.com/v4', 'success'),
+  (2, 'vultr', 'Vultr', 'https://api.vultr.com/v2', 'success');
+
+INSERT OR IGNORE INTO regions (id, provider_id, region_code, region_name, country_code, available) VALUES
+  (1, 1, 'ap-northeast', 'Tokyo 2, JP', 'JP', 1),
+  (2, 1, 'ap-south', 'Singapore, SG', 'SG', 1),
+  (3, 2, 'nrt', 'Tokyo', 'JP', 1),
+  (4, 2, 'sgp', 'Singapore', 'SG', 1);
+
+INSERT OR IGNORE INTO instance_types (id, provider_id, instance_id, instance_name, vcpu, memory_mb, storage_gb, transfer_tb, instance_family) VALUES
+  (1, 1, 'g6-nanode-1', 'Nanode 1GB', 1, 1024, 25, 1, 'general'),
+  (2, 1, 'g6-standard-1', 'Linode 2GB', 1, 2048, 50, 2, 'general'),
+  (3, 1, 'g6-standard-2', 'Linode 4GB', 2, 4096, 80, 4, 'general'),
+  (4, 2, 'vc2-1c-1gb', 'Cloud Compute 1GB', 1, 1024, 25, 1, 'general'),
+  (5, 2, 'vc2-1c-2gb', 'Cloud Compute 2GB', 1, 2048, 55, 2, 'general'),
+  (6, 2, 'vc2-2c-4gb', 'Cloud Compute 4GB', 2, 4096, 80, 3, 'general');
+
+INSERT OR IGNORE INTO pricing (id, instance_type_id, region_id, hourly_price, monthly_price, monthly_price_krw, available) VALUES
+  (1, 1, 1, 0.0075, 5.0, 7500, 1),
+  (2, 2, 1, 0.018, 12.0, 18000, 1),
+  (3, 3, 1, 0.036, 24.0, 36000, 1),
+  (4, 1, 2, 0.0075, 5.0, 7500, 1),
+  (5, 4, 3, 0.007, 5.0, 7500, 1),
+  (6, 5, 3, 0.015, 10.0, 15000, 1),
+  (7, 6, 3, 0.03, 20.0, 30000, 1),
+  (8, 4, 4, 0.007, 5.0, 7500, 1);