fix(auth): honor NOTION_TOKEN in auth status and doctor

[timqi]

Problem

When authenticating solely via the NOTION_TOKEN environment variable (no notion auth login), notion auth status reports ✗ Not authenticated and notion auth doctor reports no token found, even though other commands such as notion user me work correctly.

This regressed with the multi-profile refactor — 0.3 was unaffected, 0.7 is.

Root cause

auth status and auth doctor read the token directly from the config file (cfg.GetCurrentProfile() / cfg.Token), bypassing the shared getToken() helper (cmd/root.go) that every other command uses. getToken() resolves the token with env-first precedence (NOTION_TOKEN → config profile), so env-only auth was invisible to these two commands.

Fix

Route both auth status and auth doctor through getToken(), so env-var auth is recognized consistently. Also surface the token source (NOTION_TOKEN env vs profile) in the output. Config-based profile details are only shown when a config file is actually in use.

Verification

Built a fresh binary and exercised each path:

Scenario	Result
NOTION_TOKEN set (valid)	✓ Authenticated, Source: NOTION_TOKEN env
NOTION_TOKEN set (invalid)	correctly reports token is invalid (was: Not authenticated)
config file only, no env	✓ Authenticated, profile details as before
no token at all	✗ Not authenticated

go build, go vet, and go test ./cmd (18 passed) all green.

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