added vpn ip rotation

.env.example

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+# WebScraper Configuration File (.env)
+# ====================================
+# This file configures the behavior of the WebScraper application
+# Copy to .env and adjust values as needed
+
+# ===== ECONOMIC DATA =====
+# Start date for economic event scraping
+ECONOMIC_START_DATE=2007-02-13
+
+# How far into the future to look ahead for economic events (in months)
+ECONOMIC_LOOKAHEAD_MONTHS=3
+
+# ===== CORPORATE DATA =====
+# Start date for corporate earnings/data scraping
+CORPORATE_START_DATE=2010-01-01
+
+# ===== PERFORMANCE & CONCURRENCY =====
+# Maximum number of parallel ChromeDriver instances
+# Higher = more concurrent tasks, but higher resource usage
+MAX_PARALLEL_TASKS=3
+
+# Maximum tasks per ChromeDriver instance before recycling
+# 0 = unlimited (instance lives for entire application runtime)
+MAX_TASKS_PER_INSTANCE=0
+
+# ===== VPN ROTATION (ProtonVPN Integration) =====
+# Enable automatic VPN rotation between sessions?
+# If false, all traffic goes through system without VPN tunneling
+ENABLE_VPN_ROTATION=false
+
+# Comma-separated list of ProtonVPN servers to rotate through
+# Examples:
+#   "US-Free#1,US-Free#2,UK-Free#1"
+#   "US,UK,JP,DE,NL"
+# NOTE: Must have ENABLE_VPN_ROTATION=true for this to take effect
+VPN_SERVERS=
+
+# Number of tasks per VPN session before rotating to new server/IP
+# 0 = rotate between economic and corporate phases (one phase = one IP)
+# 5 = rotate every 5 tasks
+# NOTE: Must have ENABLE_VPN_ROTATION=true for this to take effect
+TASKS_PER_VPN_SESSION=0
+
+# Chrome Extension ID for ProtonVPN
+# Default: ghmbeldphafepmbegfdlkpapadhbakde (official ProtonVPN extension)
+# You can also use a custom extension ID if you've installed from a different source
+PROTONVPN_EXTENSION_ID=ghmbeldphafepmbegfdlkpapadhbakde
+
+# ===== LOGGING =====
+# Set via RUST_LOG environment variable:
+#   RUST_LOG=info cargo run
+#   RUST_LOG=debug cargo run
+# Leave empty or unset for default logging level