Fix multiple renders from cached up-to-date messages on page refresh

[KyleAMathews]

When a shape receives multiple updates within the HTTP cache window (60s), each update ends with an up-to-date control message that gets cached. On page refresh, these cached responses replay rapidly, causing multiple renders. This change implements cursor-based detection to suppress cached up-to-date notifications until a fresh response (with a new cursor) arrives from the server, ensuring only one render occurs.

[codecov[bot]]

Codecov Report

:x: Patch coverage is 94.04762% with 5 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 67.72%. Comparing base (6f9bba2) to head (1b4c592). :warning: Report is 67 commits behind head on main.

Files with missing lines	Patch %	Lines
...ckages/typescript-client/src/up-to-date-tracker.ts	93.93%	4 Missing :warning:
packages/typescript-client/src/client.ts	94.44%	1 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3358      +/-   ##
==========================================
- Coverage   70.14%   67.72%   -2.42%     
==========================================
  Files         178      183       +5     
  Lines        9606     9826     +220     
  Branches      290      381      +91     
==========================================
- Hits         6738     6655      -83     
- Misses       2866     3169     +303     
  Partials        2        2              

Flag	Coverage Δ
elixir	64.04% <ø> (-2.86%)	:arrow_down:
elixir-client	73.94% <ø> (-0.53%)	:arrow_down:
packages/experimental	87.73% <ø> (ø)
packages/react-hooks	86.48% <ø> (ø)
packages/typescript-client	93.62% <94.04%> (-0.57%)	:arrow_down:
packages/y-electric	55.12% <ø> (?)
postgres-140000	62.77% <ø> (-3.20%)	:arrow_down:
postgres-150000	62.82% <ø> (?)
postgres-170000	62.85% <ø> (-3.15%)	:arrow_down:
postgres-180000	62.88% <ø> (?)
sync-service	63.05% <ø> (-3.10%)	:arrow_down:
typescript	87.53% <94.04%> (-5.31%)	:arrow_down:
unit-tests	67.72% <94.04%> (-2.42%)	:arrow_down:

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commit: 1b4c592

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