Bug: assert_data_frame() doesn't check if it is a rowwise dataframe

[bundfussr]

What happened?

The assert_data_frame() function doesn't check if it is a rowwise dataframe. This can cause failure or unexpected behaviour of admiral functions (see example from the "Visit and Period Variables" vignette below).

Session Information

No response

Reproducible Example

windows <- tribble(
  ~AVISIT,    ~AWLO, ~AWHI, ~AVISITN, ~AWTARGET,
  "BASELINE",   -30,     1,        0,         1,
  "WEEK 1",       2,     7,        1,         5,
  "WEEK 2",       8,    15,        2,        11,
  "WEEK 3",      16,    22,        3,        19,
  "WEEK 4",      23,    30,        4,        26
)

adbds <- tribble(
  ~USUBJID, ~ADY,
  "1",       -33,
  "1",        -2,
  "1",         3,
  "1",        24,
  "2",        NA,
) %>% rowwise()

adbds1 <- adbds %>%
  derive_vars_joined(
    dataset_add = windows,
    filter_join = AWLO <= ADY & ADY <= AWHI,
    join_type = "all",
  )

produces

Error in `signal_duplicate_records()` at admiral/R/derive_merged.R:379:5:
! After applying `filter_join` the joined dataset contains more than one observation per observation of the input
  dataset. Please adjust `filter_add` and/or `filter_join` or specify `order` and `mode` to select one of the observations.
ℹ Run admiral::get_duplicates_dataset() to access the duplicate records