Improve ComparatorRegistry API (reified helpers as members)

[alexander-yevsyukov]

Summary

Improves the ComparatorRegistry API and folds in the routine build/dependency
maintenance that accumulated on the branch. As requested, all commits on the
branch are included in this PR.

What changed

API / code

• ComparatorRegistry — the four reified inline helpers (register,
  get, find, contains) move from top-level extension functions into
  members of the ComparatorRegistry object, alongside their Class-based
  counterparts. Call syntax is unchanged (e.g. ComparatorRegistry.get<Foo>()).
  Because these helpers are inline, removing the old top-level forms is
  effectively binary-safe for already-compiled callers.
• Indent — repeat and atLevel likewise move from extension functions
  to members. This also fixes a latent bug in the old repeat: it guarded
  require(size >= 0) (always true, since size > 0 is enforced at
  construction) and interpolated $size instead of the argument; the member
  now validates and reports the argument n.

Dependencies / build

• Bump Jackson → 2.22.1.
• Bump ErrorProne → 2.42.0 — pinned as the last release compatible with
  Java 17 (2.43.0 requires JDK 21).
• Update the config submodule and sync the distributed buildSrc
  (Kover/coverage configuration, dependency local objects).
• Regenerate the dependency reports under docs/dependencies/.

Versioning

• Bump the project version 2.0.0-SNAPSHOT.423 → 2.0.0-SNAPSHOT.424.

Commits

Meaningful:

• Bump version -> 2.0.0-SNAPSHOT.424
• Transform extension functions in to members (Indent)
• Bump Jackson -> 2.22.1
• Constrain reified register to Any; fix get KDoc grammar (review follow-up)
• Bump ErrorProne -> 2.42.0

Routine sync: Update config ×2, Update dependency report(s) ×4.

Validation

The local pre-PR checklist ran green on the ComparatorRegistry / Indent
changes: ./gradlew build dokkaGenerate on JDK 17 — PASS (incl. the Kover
coverage gate and Dokka link resolution); reviewers spine-code-review
APPROVE, kotlin-engineer / review-docs APPROVE WITH CHANGES, no
Must-fix. The later dependency bumps (Jackson, ErrorProne) and review
follow-ups are covered by CI on the branch head.

Notes for reviewers

• Review follow-ups applied (ae91fe61a7): ComparatorRegistry.register
  is now <reified T : Any> (matching its siblings), and the relocated get()
  KDoc grammar ("no a comparator" → "no comparator") is corrected.
• Indent binary compatibility (decided): dropping the non-inline
  IndentKt.repeat/atLevel facade is a binary break for pre-compiled callers.
  Accepted as intentional for the 2.0.0 major line — SNAPSHOTs don't promise
  cross-version binary compatibility.
• Open nit: Indent.atLevel(l: Int) uses a single-letter parameter;
  level would read better.

[Copilot]

Pull request overview

This PR refines the public API of ComparatorRegistry (and Indent) by relocating reified helper functions into their owning types, while also rolling in routine version/dependency/report updates and some build/coverage tooling maintenance.

Changes:

• Move reified ComparatorRegistry helpers (register/get/find/contains) from top-level extensions into ComparatorRegistry members.
• Move Indent.repeat / Indent.atLevel from extensions into Indent members (and correct the argument validation/message).
• Bump published snapshot version and refresh dependency versions/reports (including Jackson 2.22.1).

Reviewed changes

Copilot reviewed 18 out of 22 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
version.gradle.kts	Bumps versionToPublish snapshot.
docs/dependencies/pom.xml	Updates generated dependency POM versions (incl. Jackson, Spine artifacts).
docs/dependencies/dependencies.md	Regenerates dependency/license report with updated versions/timestamp.
buildSrc/src/main/kotlin/io/spine/gradle/testing/TestKitCoverage.kt	Refactors agent coordinate usage for TestKit coverage wiring.
buildSrc/src/main/kotlin/io/spine/gradle/testing/SpineCompilerCoverage.kt	Adds new helper to capture JaCoCo exec data from forked Spine Compiler JVMs.
buildSrc/src/main/kotlin/io/spine/gradle/report/coverage/SiblingCoverage.kt	Adjusts visibility/API to share the “consumes binary reports” predicate.
buildSrc/src/main/kotlin/io/spine/gradle/report/coverage/KoverConfig.kt	Extends root Kover aggregation to include additional exec data sources and updates Gradle dependency notation.
buildSrc/src/main/kotlin/io/spine/dependency/test/Jacoco.kt	Centralizes JaCoCo agent coordinates as Jacoco.agent.
buildSrc/src/main/kotlin/io/spine/dependency/local/Validation.kt	Updates local dependency version constant.
buildSrc/src/main/kotlin/io/spine/dependency/local/ToolBase.kt	Updates local dependency version constants.
buildSrc/src/main/kotlin/io/spine/dependency/local/Time.kt	Updates local dependency version constant.
buildSrc/src/main/kotlin/io/spine/dependency/local/Logging.kt	Updates local dependency version constant.
buildSrc/src/main/kotlin/io/spine/dependency/local/CoreJvm.kt	Updates local dependency version constant.
buildSrc/src/main/kotlin/io/spine/dependency/local/Compiler.kt	Updates fallback compiler versions.
buildSrc/src/main/kotlin/io/spine/dependency/local/Base.kt	Updates local dependency versions used for build/script alignment.
buildSrc/src/main/kotlin/io/spine/dependency/lib/Jackson.kt	Bumps Jackson version to 2.22.1.
base/src/main/kotlin/io/spine/string/Indent.kt	Moves repeat/atLevel into Indent and fixes validation bug.
base/src/main/kotlin/io/spine/compare/ComparatorRegistry.kt	Moves reified helper functions into ComparatorRegistry as members.
.idea/misc.xml	Removes committed IDEA project-local settings file.
.gitignore	Stops re-including .idea/misc.xml and adds ignores for Claude Code local files/dirs.
.claude/settings.json	Updates Claude Code settings (plans directory and allowed actions).

Files not reviewed (1)

• .idea/misc.xml: Generated file

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[Copilot]

Pull request overview

Copilot reviewed 18 out of 22 changed files in this pull request and generated 3 comments.

Files not reviewed (1)

• .idea/misc.xml: Generated file

[Copilot]

Pull request overview

Copilot reviewed 18 out of 22 changed files in this pull request and generated no new comments.

Files not reviewed (1)

• .idea/misc.xml: Generated file

[Copilot]

Pull request overview

Copilot reviewed 19 out of 23 changed files in this pull request and generated no new comments.

Files not reviewed (1)

• .idea/misc.xml: Generated file

[Copilot]

Pull request overview

Copilot reviewed 19 out of 23 changed files in this pull request and generated no new comments.

Files not reviewed (1)

• .idea/misc.xml: Generated file

[codecov]

Codecov Report

❌ Patch coverage is 42.85714% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 94.02%. Comparing base (c324bc7) to head (62e6bc2).
⚠️ Report is 13 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #952   +/-   ##
=======================================
  Coverage   94.02%   94.02%           
=======================================
  Files         192      192           
  Lines        4187     4187           
  Branches      346      345    -1     
=======================================
  Hits         3937     3937           
  Misses        149      149           
  Partials      101      101           

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