docs/environment-variables.md omits mcpdo: its daemon variables and Read-by entries #2640

Problem

Raised by Copilot on the v2.10.0 milestone merge (#2637). docs/environment-variables.md says it lists every environment variable that changes how the Inspector behaves, but mcpdo, which ships for the first time in 2.10.0, is missing from it:

• Three variables mcpdo reads are documented only in specification/v2_cli_v2.md (and skills/mcpdo/SKILL.md):
  • MCP_INSPECTOR_DAEMON_DIR
  • MCP_INSPECTOR_DAEMON_TOKEN (both set by eval "$(mcpdo private)")
  • MCP_ALLOW_DEFAULT_CONNECTION
• The shared variables mcpdo also reads (MCP_STORAGE_DIR, MCP_CATALOG_PATH, MCP_CLIENT_CONFIG_PATH, MCP_OAUTH_CALLBACK_URL, the OAuth state and secret-store variables reached through core/) do not list mcpdo in their Read by column, and the column legend names only web, CLI, TUI and launcher.

Expected

The page names mcpdo in its legend and in each Read-by cell it applies to, and documents the three daemon variables with their defaults and effects, taken from the source (clients/mcpdo/src/daemon/paths.ts, daemon/auth.ts, connection/dispatch.ts).

Priority

Medium (rubric total 7): Severity 2 (doc gap, workaround is reading the spec), Urgency 4 (ships with the first mcpdo release), +1 milestoned.