Initial codex telegram bot source

.env.example

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+TELEGRAM_BOT_TOKEN=
+
+# Use absolute host paths. The socket is mounted at the same path in the container.
+HOST_CODEX_SOCKET=/absolute/path/to/codex-telegram-bot/run/codex.sock
+HOST_CODEX_RUN_DIR=/absolute/path/to/codex-telegram-bot/run
+HOST_UPLOAD_DIR=/absolute/path/to/codex-telegram-bot/uploads
+
+# Host-side SQLite directory mounted to /data in the container.
+DB_DIR=./data
+
+# Leave empty to use Codex defaults.
+DEFAULT_MODEL=
+DEFAULT_SANDBOX=workspace-write
+POLL_TIMEOUT_SECONDS=30
+
+# Container should usually match the host user so SQLite files remain writable.
+BOT_UID=1001
+BOT_GID=1001