ninja router ; proper api docs and removed redundant exception handlers

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 71.31%. Comparing base (5b63619) to head (7067ee6). Report is 13 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #866 +/- ## ========================================== - Coverage 74.35% 71.31% -3.05% ========================================== Files 195 70 -125 Lines 8007 6843 -1164 ========================================== - Hits 5954 4880 -1074 + Misses 2053 1963 -90 ``` | [Flag](https://app.codecov.io/gh/DalgoT4D/DDP_backend/pull/866/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DalgoT4D) | Coverage Δ | | |---|---|---| | [](https://app.codecov.io/gh/DalgoT4D/DDP_backend/pull/866/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DalgoT4D) | `71.31% <100.00%> (-3.05%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DalgoT4D#carryforward-flags-in-the-pull-request-comment) to find out more.

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