Fix: unify rename docstore title tokens with indexing semantics

[yongtenglei]

What problem does this PR solve?

Unify rename docstore title tokens with indexing semantics.

Type of change

• Bug Fix (non-breaking change which fixes an issue)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.72%. Comparing base (e705ac6) to head (2e6e927).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #13697   +/-   ##
=======================================
  Coverage   96.72%   96.72%           
=======================================
  Files          10       10           
  Lines         702      702           
  Branches      112      112           
=======================================
  Hits          679      679           
  Misses          5        5           
  Partials       18       18           

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