Add extra types so a non-empty string is treated as true but an empty
string is treated as false

The linter finally got its way. Import ordering across the authentication
and management modules was brought into line with ruff's expectations,
because apparently alphabetical order is the hill we die on. Blank lines
that contributed nothing but existential whitespace were also removed.
Nobody mourned them. 🪦

The pre-commit configuration was migrated from remote repository hooks to
local system-level hooks for both ruff and ggshield. This means builds
no longer depend on fetching specific tagged versions from GitHub at hook
install time — the locally installed tools are used directly instead.
One less thing to break on a Monday morning. 🔧

A minor formatting adjustment landed in the UserResponseSchema where a
long pydantic.Field call was wrapped to respect line length limits. The
.gitignore also picked up an entry for error.txt and had its missing
trailing newline restored, because even config files deserve a proper
ending. 📝

Test files received the same import-sorting treatment. No logic changed,
no assertions were harmed — just imports shuffled into the order the
linter demanded. The tests still pass, the code still works, and the
diff is mostly whitespace. Such is the life of a codebase under the
watchful eye of automated formatting. 🤖

Signed-off-by: Tim Gates <[email protected]>