drop require('dotenv') from ecosystem.config.js files (#1230)

TSSBOT has no node_modules/ on the server (no package.json was ever
installed for it), so `require('dotenv').config()` crashes pm2 with
MODULE_NOT_FOUND when it loads the ecosystem file. The dotenv call was
already dead code: every spawned app loads its own .env in its own
process (botscript.py, server.js, web/server.js, webhook updater,
TSSBOT/start_bot.py all do load_dotenv / require('dotenv').config()
themselves). Remove the require from both ecosystem files.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

ecosystem.config.js

@@ -1,15 +1,15 @@
-// Single source of truth for runtime config is TSSBOT/.env (loaded here).
-// Do NOT add `env:` blocks to apps below — they would override the .env values
-// and create two parallel config sources to reason about.
-require('dotenv').config();
+// Single source of truth for runtime config is TSSBOT/.env. start_bot.py
+// loads it directly (load_dotenv(_HERE / ".env")). Do NOT add `env:` blocks
+// below or `require('dotenv')` here — either would create a second config
+// source that can silently shadow .env, and the dotenv require would fail
+// outright on hosts that don't have node_modules/ installed in TSSBOT.
 
 const DEPLOY_PATH = __dirname;
 
 // Reuse SREBOT's venv by default — both bots share BOTS/SHARED and most
 // runtime deps (discord.py, dotenv, …). Split into TSSBOT/.venv once the
 // dep sets diverge meaningfully.
-const PY_INTERPRETER =
-  process.env.TSSBOT_PY_INTERPRETER || `${DEPLOY_PATH}/../SREBOT/.venv/bin/python`;
+const PY_INTERPRETER = `${DEPLOY_PATH}/../SREBOT/.venv/bin/python`;
 
 module.exports = {
   apps: [