fix: harden profile reuse and uniformize profile display and reuse

[leonkenneth]

There was still remnance of profile inspect and profile show

I kept the inspect one as it looked simpler

I also added a heuristic to explicitly reuse a profile if it's not configured yet and special-case ENV-supplied credentials into a pseudo-profile

[albert20260301]

The semantic title check is failing because improve: is not an allowed Conventional Commit type.

Suggested title:

fix: harden profile reuse and uniformize profile display

feat: would also work if this is intended as a user-visible capability rather than a hardening/fix PR.

[albert20260301]

The title is fixed now. The remaining Test CLI failure is a stale assertion from the profile output refactor:

TypeError: undefined is not an object (evaluating 'JSON.parse(result.stdout).profile.user.email')

profile show now returns identity under profile.principal, so this line in tests/integration.e2e.ts should change:

-    expect(JSON.parse(result.stdout).profile.user.email).toBe("agent@x.io");
+    expect(JSON.parse(result.stdout).profile.principal.email).toBe("agent@x.io");

I verified the related non-service checks locally:

bun test "$PWD"/tests/context.test.ts "$PWD"/tests/scripting.test.ts
./cli/node_modules/.bin/tsc -p tsconfig.tests.json
git diff --check

The full tests/integration.e2e.ts cannot be fully reproduced in this workspace without the CI altertable-mock service on port 15000; locally it fails earlier with network exit code 9. I also tried pushing this one-line fix directly, but this account does not have write permission to the org-owned PR branch.