chore: track the latest WordPress release in blueprints and tests

[josephfusco]

Description:

The blueprints and the test environment were still aimed at the development branch from before 7.0 shipped, so neither matched the Requires at least: 7.0 floor the plugin actually supports.

Verified locally against the resolved version, 7.0.3: PHPUnit OK (115 tests, 240 assertions) and Playwright 13 passed.

Use of AI Tools

AI assistance: Yes
Tool(s): Claude Code
Model(s): Claude Opus 5
Used for: Drafting and implementation

[github-actions]

The following accounts have interacted with this PR and/or linked issues. I will continue to update these lists as activity occurs. You can also manually ask me to refresh this list by adding the props-bot label.

Core Committers: Use this line as a base for the props when committing in SVN:

Props joefusco.

To understand the WordPress project's expectations around crediting contributors, please review the Contributor Attribution page in the Core Handbook.

[github-actions]

▶ Preview in WordPress Playground

Boots a fresh WordPress with this PR's presence-api build, seeds 5 demo users, and drops you on the dashboard.

_{Stress-test variant: 40 demo users · Built from c65329a1262feccaf67672840c31e5d5f7f492f2. Auto-updates when you push.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 46.05%. Comparing base (58ca2d0) to head (c65329a).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #202   +/-   ##
=========================================
  Coverage     46.05%   46.05%           
  Complexity      170      170           
=========================================
  Files            15       15           
  Lines          1889     1889           
=========================================
  Hits            870      870           
  Misses         1019     1019           

Flag	Coverage Δ
phpunit	46.05% <ø> (ø)

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