enhance: Read metadata concurrently to accelerate recovery

[bigsheeper]

Read metadata such as segments, binlogs, and partitions concurrently at the collection level.

issue: #37630

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.93%. Comparing base (01fa2f8) to head (acd4208).
Report is 2 commits behind head on master.

❗ Current head acd4208 differs from pull request most recent head 158fd9e

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Flag	BASE (01fa2f8)	HEAD (acd4208)
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Additional details and impacted files

@@             Coverage Diff             @@
##           master   #38403       +/-   ##
===========================================
- Coverage   80.92%   68.93%   -12.00%     
===========================================
  Files        1377      292     -1085     
  Lines      193866    26161   -167705     
===========================================
- Hits       156887    18034   -138853     
+ Misses      31442     8127    -23315     
+ Partials     5537        0     -5537     

Components	Coverage Δ
Client	∅ <ø> (∅)
Core	68.93% <ø> (-0.05%)	⬇️
Go	∅ <ø> (∅)

see 1109 files with indirect coverage changes

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