[cleanup] PIP-457: Remove NamespaceName.isGlobal() and TopicName.isGlobal()

[merlimat]

Motivation

Follow-up cleanup for PIP-457 (V1 topic name and namespace removal, #25275 and #25304).

With V1 namespace removal, NamespaceName.isGlobal() always returns true (since all namespaces are now 2-part V2 format). This makes isGlobal() dead code — every condition checking it is either always-true or always-false.

Modifications

• Removed NamespaceName.isGlobal() and TopicName.isGlobal() methods
• Simplified all call sites across the broker:
  • Always-true if (x.isGlobal()) conditions: unwrapped to just the body
  • Always-false if (!x.isGlobal()) conditions: removed as dead code
  • Combined conditions: removed the isGlobal() term
• Cleaned up PersistentTopicsBase.java: chained thenCompose() calls directly instead of using intermediate variables with block lambdas (~30 methods simplified)

Verifying this change

This change is a pure refactor with no behavioral change — isGlobal() already returned true unconditionally.

Documentation

• doc
• doc-required
• doc-not-needed
• doc-complete

[codecov-commenter]

Codecov Report

❌ Patch coverage is 83.33333% with 23 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.74%. Comparing base (ce5bc13) to head (4b986d3).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...oker/service/nonpersistent/NonPersistentTopic.java	47.05%	6 Missing and 3 partials ⚠️
...sar/broker/service/persistent/PersistentTopic.java	57.89%	7 Missing and 1 partial ⚠️
...he/pulsar/broker/admin/v2/NonPersistentTopics.java	20.00%	4 Missing ⚠️
...pulsar/broker/admin/impl/PersistentTopicsBase.java	97.89%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #25319      +/-   ##
============================================
+ Coverage     72.73%   72.74%   +0.01%     
+ Complexity    34671    34217     -454     
============================================
  Files          1967     1954      -13     
  Lines        156326   154609    -1717     
  Branches      17812    17693     -119     
============================================
- Hits         113697   112475    -1222     
+ Misses        33552    33125     -427     
+ Partials       9077     9009      -68     

Flag	Coverage Δ
inttests	25.90% <31.15%> (+0.15%)	⬆️
systests	22.49% <19.56%> (+0.12%)	⬆️
unittests	73.73% <83.33%> (+0.03%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
.../org/apache/pulsar/broker/admin/AdminResource.java	77.26% <100.00%> (+0.50%)	⬆️
...rg/apache/pulsar/broker/service/BrokerService.java	83.68% <ø> (+0.02%)	⬆️
...rg/apache/pulsar/broker/web/PulsarWebResource.java	65.70% <100.00%> (+1.74%)	⬆️
...org/apache/pulsar/common/naming/NamespaceName.java	89.28% <ø> (+0.24%)	⬆️
...ava/org/apache/pulsar/common/naming/TopicName.java	90.72% <ø> (-1.18%)	⬇️
...pulsar/broker/admin/impl/PersistentTopicsBase.java	69.98% <97.89%> (+0.16%)	⬆️
...he/pulsar/broker/admin/v2/NonPersistentTopics.java	64.00% <20.00%> (+0.28%)	⬆️
...sar/broker/service/persistent/PersistentTopic.java	80.23% <57.89%> (-0.04%)	⬇️
...oker/service/nonpersistent/NonPersistentTopic.java	71.42% <47.05%> (-1.47%)	⬇️

... and 108 files with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.