fix(E105): replace catch-all exception handlers with specific exceptions
- Parsing functions (int_of_string, float_of_string, Int64.of_string):
catch Failure _ instead of _
- TLS inhibit/try_write_t: use _exn to name the caught exception
- sql open_or_create: catch Failure _ | Eio.Io _
- run_tests json_equal: catch Failure _ | Invalid_argument _