Another attempt to fix seatable cache issue

[jefferis]

• seems like the toke associated with the base expires
• but the expiry time is not reliably stored in the python object ...

[codecov[bot]]

Codecov Report

Merging #157 (c2ee431) into master (d907d3b) will increase coverage by 0.03%. The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master     #157      +/-   ##
==========================================
+ Coverage   45.42%   45.45%   +0.03%     
==========================================
  Files          32       32              
  Lines        3868     3874       +6     
==========================================
+ Hits         1757     1761       +4     
- Misses       2111     2113       +2     

Impacted Files	Coverage Δ
R/flytable.R	64.21% <66.66%> (+0.03%)	:arrow_up:

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[jefferis]

fixed in https://github.com/natverse/fafbseg/pull/170/commits/ba1e3703a98607bbdb760169748a1cedcc42b5ef