meta/sql: add primary key for all tables

[davies]

close #1576

[codecov-commenter]

Codecov Report

Merging #1913 (e696e69) into main (2d7df98) will decrease coverage by 0.05%.
The diff coverage is 53.33%.

❗ Current head e696e69 differs from pull request most recent head b2ecf55. Consider uploading reports for the commit b2ecf55 to get more accurate results

@@            Coverage Diff             @@
##             main    #1913      +/-   ##
==========================================
- Coverage   61.62%   61.57%   -0.06%     
==========================================
  Files         135      135              
  Lines       23433    23434       +1     
==========================================
- Hits        14441    14429      -12     
- Misses       7321     7332      +11     
- Partials     1671     1673       +2     

Impacted Files	Coverage Δ
pkg/meta/sql.go	64.73% <53.33%> (-0.10%)	⬇️
pkg/vfs/reader.go	80.29% <0.00%> (-2.56%)	⬇️
pkg/vfs/vfs.go	77.88% <0.00%> (-0.28%)	⬇️
pkg/meta/redis.go	71.64% <0.00%> (-0.05%)	⬇️
pkg/chunk/cached_store.go	76.23% <0.00%> (+0.54%)	⬆️
pkg/vfs/writer.go	79.66% <0.00%> (+1.01%)	⬆️

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