this derivation will be built:
  /nix/store/79s0k7xmnfvh3yfnag07a455fnfccgx5-treefmt-check.drv
building '/nix/store/79s0k7xmnfvh3yfnag07a455fnfccgx5-treefmt-check.drv'
treefmt-check> treefmt v2.5.0ERRO formatter | ruff-check: failed to apply with options '[check --fix]': exit status 1
treefmt-check> 
treefmt-check> PLR0911 Too many return statements (7 > 6)
treefmt-check>    --> packages/harvest-invoicer/src/harvest_invoicer/app.py:875:9
treefmt-check>     |
treefmt-check> 874 |     @app.post("/settings/clients/save")
treefmt-check> 875 |     def settings_clients_save() -> str:
treefmt-check>     |         ^^^^^^^^^^^^^^^^^^^^^
treefmt-check> 876 |         """Add or update a clients.json entry (file + running session)."""
treefmt-check> 877 |         clients_map: dict[str, dict[str, object]] = app.state["clients"]  # type: ignore[attr-defined]
treefmt-check>     |
treefmt-check> 
treefmt-check> TC003 Move standard library import `collections.abc.Callable` into a type-checking block
treefmt-check>   --> packages/harvest-invoicer/src/harvest_invoicer/i18n.py:15:29
treefmt-check>    |
treefmt-check> 13 | from __future__ import annotations
treefmt-check> 14 |
treefmt-check> 15 | from collections.abc import Callable
treefmt-check>    |                             ^^^^^^^^
treefmt-check> 16 |
treefmt-check> 17 | TRANSLATIONS: dict[str, dict[str, str]] = {
treefmt-check>    |
treefmt-check> help: Move into type-checking block
treefmt-check> 
treefmt-check> Found 2 errors.
treefmt-check> No fixes available (1 hidden fix can be enabled with the `--unsafe-fixes` option).
treefmt-check> 
treefmt-check> traversed 168 files
treefmt-check> emitted 95 files for processing
treefmt-check> formatted 88 files (0 changed) in 2.726s
treefmt-check> Error: failed to finalise formatting: formatting failures detected
error: Cannot build '/nix/store/79s0k7xmnfvh3yfnag07a455fnfccgx5-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/rn8hm1k9xfdzyfjkidh3m1y5gid4md9w-treefmt-check
       Last 25 log lines:
       > 875 |     def settings_clients_save() -> str:
       >     |         ^^^^^^^^^^^^^^^^^^^^^
       > 876 |         """Add or update a clients.json entry (file + running session)."""
       > 877 |         clients_map: dict[str, dict[str, object]] = app.state["clients"]  # type: ignore[attr-defined]
       >     |
       >
       > TC003 Move standard library import `collections.abc.Callable` into a type-checking block
       >   --> packages/harvest-invoicer/src/harvest_invoicer/i18n.py:15:29
       >    |
       > 13 | from __future__ import annotations
       > 14 |
       > 15 | from collections.abc import Callable
       >    |                             ^^^^^^^^
       > 16 |
       > 17 | TRANSLATIONS: dict[str, dict[str, str]] = {
       >    |
       > help: Move into type-checking block
       >
       > Found 2 errors.
       > No fixes available (1 hidden fix can be enabled with the `--unsafe-fixes` option).
       >
       > traversed 168 files
       > emitted 95 files for processing
       > formatted 88 files (0 changed) in 2.726s
       > Error: failed to finalise formatting: formatting failures detected
       For full logs, run:
         nix log /nix/store/79s0k7xmnfvh3yfnag07a455fnfccgx5-treefmt-check.drv