Adopt new TemplateString and Placeholder API

[alexander-yevsyukov]

This PR migrates Spine Time to newest version of Base, Validation, and CoreJvm Compiler. This brings new TemplateString API to which this PR migrates.

[Copilot]

Pull request overview

This PR updates validation placeholder usage to newer io.spine.string/StandardPlaceholder APIs, refreshes dependency versions and Gradle wrapper metadata, and reorganizes generated dependency reports under docs/dependencies.

Changes:

• Migrates (when) and LocalDateValidator placeholder handling to new placeholder types.
• Updates build/report generation paths and dependency versions, including Gradle wrapper metadata.
• Adds/updates agent documentation for version and Gradle bump workflows.

Reviewed changes

Copilot reviewed 25 out of 28 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
validation/src/main/kotlin/io/spine/tools/time/validation/java/WhenOption.kt	Uses StandardPlaceholder values for supported (when) placeholders.
validation/src/main/kotlin/io/spine/tools/time/validation/java/WhenGenerator.kt	Generates placeholder maps with io.spine.string.Placeholder.
time/src/test/java/io/spine/time/validation/WhenTest.java	Updates imports and disables the (when) test class.
time/src/main/kotlin/io/spine/time/validation/LocalDateValidator.kt	Migrates runtime placeholder template construction.
tests/build.gradle.kts	Adds Base to compiler configuration for new template classes.
gradlew.bat	Updates Windows Gradle wrapper script behavior.
gradlew	Updates wrapper template reference comment.
gradle/wrapper/gradle-wrapper.properties	Bumps Gradle distribution and wrapper retry properties.
docs/dependencies/pom.xml	Adds generated dependency POM under docs.
CLAUDE.md	Corrects agent documentation path.
buildSrc/src/test/kotlin/io/spine/gradle/report/license/DependencyReportOutputTest.kt	Adds tests for dependency report output locations.
buildSrc/src/main/kotlin/io/spine/gradle/report/pom/PomGenerator.kt	Writes generated POM under docs/dependencies.
buildSrc/src/main/kotlin/io/spine/gradle/report/license/Paths.kt	Centralizes dependency report output paths.
buildSrc/src/main/kotlin/io/spine/gradle/report/license/LicenseReporter.kt	Writes merged license report under docs/dependencies.
buildSrc/src/main/kotlin/io/spine/dependency/local/Validation.kt	Updates Validation dependency version.
buildSrc/src/main/kotlin/io/spine/dependency/local/CoreJvmCompiler.kt	Updates Core JVM compiler dependency versions.
buildSrc/src/main/kotlin/io/spine/dependency/local/Base.kt	Updates Base dependency versions.
.gitignore	Ignores Claude working files.
.github/workflows/ensure-reports-updated.yml	Renames dependency report check step.
.agents/version-policy.md	Replaces detailed local version instructions with policy/skill references.
.agents/skills/writer/SKILL.md	Adds documentation quoting guidance.
.agents/skills/bump-version/SKILL.md	Adds version bump agent skill.
.agents/skills/bump-version/agents/openai.yaml	Adds OpenAI metadata for version bump skill.
.agents/skills/bump-gradle/SKILL.md	Adds Gradle wrapper bump agent skill.
.agents/skills/bump-gradle/agents/openai.yaml	Adds OpenAI metadata for Gradle bump skill.

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[Copilot]

Pull request overview

Copilot reviewed 28 out of 31 changed files in this pull request and generated 1 comment.

[armiol]

@alexander-yevsyukov LGTM, hopefully the CI check is fixed by this PR I have just approved as well.

[codecov]

Codecov Report

❌ Patch coverage is 26.66667% with 11 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.88%. Comparing base (f8d6d30) to head (f2d4b56).

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #196   +/-   ##
=========================================
  Coverage     83.88%   83.88%           
  Complexity      304      304           
=========================================
  Files            60       60           
  Lines          1086     1086           
  Branches         46       46           
=========================================
  Hits            911      911           
  Misses          165      165           
  Partials         10       10           

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