ldb_invariant() doesn't format the given string using the rest of the parameters

[medvied]

Example:

The code:

630         ldb_invariant(max_offset == FirstOffsetNumber,                                                            
631                       "ERROR: Blockmap max_offset is %d but was supposed to be %d",                               
632                       max_offset,                                                                                 
633                       FirstOffsetNumber);  

The error messages:

WARNING:  LanternDB invariant violation: ERROR: Blockmap max_offset is %d but was supposed to be %d
ERROR:  LanternDB invariant violation: ERROR: Blockmap max_offset is %d but was supposed to be %d. Please restart your DB session and report this error

The values of max_offset and FirstOffsetNumber are not present in the error messages.