Zombie TODOs pass for 0.9.1

[teh-cmc]

Latest dump:

• ./rerun_py/rerun_sdk/rerun/log_deprecated/transform.py+24: # TODO(Mark old log_points style SDK as deprecated #3275): Deprecation notices on these
• ./crates/re_arrow_store/src/store_write.rs+218: // TODO(arrow2_convert primitive (de)serialization performance issues #1712): That's exactly how one should create a cell of instance keys…
• ./crates/re_log_types/src/data_table.rs+928: // TODO(arrow2_convert primitive (de)serialization performance issues #1712): This is unnecessarily slow…
• ./crates/re_log_types/src/data_table.rs+1007: // TODO(arrow2 does _not_ refcount schema metadata #1805): Schema metadata gets cloned in every single array.
• ./crates/re_tuid/src/lib.rs+26: // TODO(Should be able to specify a name when deriving ArrowField #1774): shouldn't have to write this manually