Replaces broad `except Exception` with specific types that reflect the
actual failure modes:
- _save_credentials: `except OSError` (IO-only path; re-raises for cleanup)
- _post error handler: `except (OSError, ValueError)` (network + bad JSON)
- poll-loop: `except (OSError, ValueError)` (network + bad JSON)
Also:
- Simplify _fake_get to use next(..., default) — removes uncovered
StopIteration branch
- Add encoding="utf-8" to open() in test_approved_flow_returns_0
- Add test_cleanup_on_write_failure to cover the except OSError block
in _save_credentials
All files score 10.00/10 on pylint (fail-under=10) and 0 errors on
pyright strict.
Write credentials via a 0600 temp file + os.replace() so the token file
never appears at its final path with world-readable permissions, even if
the process is interrupted between write and chmod.
Parse poll_interval from the authorization response (clamped to 1–60 s,
falling back to _POLL_SLEEP) so aggressive polling can't trigger console
rate limits.
Tests: add atomicity spy asserting the temp file is 0600 before replace;
patch time.sleep instead of _POLL_SLEEP; add explicit interval-passthrough
assertion.
Starts a device-authorization flow against a bot-bottle console, polls
until the operator approves, then writes access + refresh tokens to
$BOT_BOTTLE_ROOT/console.json. Console URL is read from --console-url
flag or BB_CONSOLE_URL env var.
Part of didericis/bot-bottle-platform#1