What does this PR do?

send_message_tool fails to send photos/media via Telegram when a proxy is configured in ~/.hermes/.env. The gateway adapter works fine because it loads .env and uses HTTPXRequest(proxy=...), but the fallback _send_telegram() function creates a plain Bot(token=token) without any proxy configuration.

Root cause:

1. .env file is never loaded in send_message_tool.py, so TELEGRAM_PROXY env var is empty
2. resolve_proxy_url("TELEGRAM_PROXY", ...) returns None because the environment isn't populated
3. Bot(token=token) is created without proxy → connection to Telegram API fails behind proxy

Solution:

1. Load .env at module level (lines 18-24): loads once on import, makes all env vars available via os.environ for any function in the module
2. Resolve and use proxy in _send_telegram(): read TELEGRAM_PROXY from environment using resolve_proxy_url(), create HTTPXRequest(proxy=proxy_url), pass it to Bot(token=token, request=httpx_request)

Related Issue

Fixes # (no issue number yet — please create one if needed)

Type of Change

• 🐛 Bug fix (non-breaking change that fixes an issue)

Changes Made

• tools/send_message_tool.py: +20 lines, -1 line
  • Added module-level .env loading wrapped in try/except for safety
  • Inside _send_telegram(): proxy resolution via resolve_proxy_url() and HTTPXRequest creation
  • Bot now uses request=bot_request parameter instead of plain constructor

How to Test

1. Configure TELEGRAM_PROXY=socks5://... in ~/.hermes/.env (or use HTTPS proxy)
2. Ensure direct Telegram API access is blocked or slow so proxy is required
3. Run the following Python command to send a photo:

cd ~/.hermes/hermes-agent && python3 << 'EOF'
from tools.send_message_tool import send_message_tool

result = send_message_tool({
    "action": "send",
    "target": "telegram:<chat_id>",
    "message": 
})

import json
print(json.dumps(result, indent=2))
EOF

4. Verify the photo arrives in Telegram without timeout errors and result["success"] is true.

Checklist

Code

• I've read the Contributing Guide
• My commit messages follow Conventional Commits (fix: ...)
• I searched for existing PRs to make sure this isn't a duplicate
• My PR contains only changes related to this fix/feature (no unrelated commits)
• I've run pytest tests/ -q and all tests pass (run locally before merging)
• I've added tests for my changes (should add test in tools/test_send_message_tool.py)
• I've tested on my platform: Ubuntu 24.04 (WSL)

Documentation & Housekeeping

• I've updated relevant documentation — or N/A
• I've updated cli-config.yaml.example if I added/changed config keys — or N/A
• I've updated CONTRIBUTING.md or AGENTS.md if I changed architecture or workflows — or N/A
• I've considered cross-platform impact (Windows, macOS) per the compatibility guide — or N/A
• I've updated tool descriptions/schemas if I changed tool behavior — or N/A

Screenshots / Logs

Before fix: Failed to send media ...jpg: Timed out (no proxy used)
After fix: Photo delivered successfully, Message ID received.