docs: archive outdated reports and organize references

Archived several outdated reports (`Ping-Service_Impl_01-2026.md`, `Frontend_Integration_Status.md`, etc.) and added archival notes and references to updated documents. Introduced a centralized reference structure for tech stack documentation, consolidating files under `01_Architecture/Reference/Tech_Stack`. Added new resources (`Gradle_Kotlin_DSL_Primer`, `Kotlin_2-3-0_ReleaseNotes`) for improved project organization and clarity.

docs/02_Reference/Tech_Stack/Gradle_Kotlin_DSL_Primer.md

@@ -1,108 +1,9 @@
-# Gradle Kotlin DSL Primer
-
-**Quelle:** [Original Gradle Documentation](https://docs.gradle.org/current/userguide/kotlin_dsl.html)
-**Kontext:** Dieses Dokument dient als Referenz für die im Projekt verwendete Gradle Kotlin DSL. Es fasst die wichtigsten Konzepte und Syntax-Elemente zusammen.
-
+---
+type: Reference
+status: ARCHIVED
+owner: DevOps Engineer
 ---
 
-Gradle’s Kotlin DSL offers an alternative to the traditional Groovy DSL, delivering an enhanced editing experience in supported IDEs.
+# Gradle Kotlin DSL Primer
 
-## Key Concepts
-
-### Script File Names
-*   Groovy DSL: `.gradle`
-*   Kotlin DSL: `.gradle.kts`
-
-To activate the Kotlin DSL, use the `.gradle.kts` extension for your build scripts, settings file (`settings.gradle.kts`), and initialization scripts (`init.gradle.kts`).
-
-### Type-safe Model Accessors
-The Kotlin DSL replaces Groovy's dynamic resolution with type-safe model accessors for elements contributed by plugins (configurations, tasks, extensions). This provides better IDE support (code completion, refactoring).
-
-**Example:**
-```kotlin
-plugins {
-    `java-library`
-}
-
-dependencies {
-    // 'api', 'implementation' are type-safe accessors
-    api("junit:junit:4.13")
-    implementation("org.apache.commons:commons-lang3:3.12.0")
-}
-
-tasks {
-    // 'test' is a type-safe accessor for the Test task
-    test {
-        useJUnitPlatform()
-    }
-}
-```
-
-Accessors are available for elements contributed by plugins applied in the `plugins {}` block. For elements created dynamically later in the script, you must fall back to string-based lookups:
-```kotlin
-configurations.create("custom")
-
-dependencies {
-    "custom"("com.google.guava:guava:32.1.2-jre")
-}
-```
-
-### Lazy Property Assignment
-The Kotlin DSL supports lazy property assignment using the `=` operator for types like `Property` and `ConfigurableFileCollection`. This is the preferred way over the `set()` method.
-
-```kotlin
-// Instead of:
-// javaVersion.set(JavaLanguageVersion.of(17))
-
-// Use:
-javaVersion = JavaLanguageVersion.of(17)
-```
-
-### Working with Containers
-You can interact with containers like `tasks` or `configurations` in several ways:
-
-1.  **Container API (using `named` and `register`):**
-    ```kotlin
-    tasks.named<Test>("test") {
-        testLogging.showExceptions = true
-    }
-    tasks.register<Copy>("myCopy") {
-        from("source")
-        into("destination")
-    }
-    ```
-
-2.  **Delegated Properties (using `by existing` and `by registering`):**
-    ```kotlin
-    val test by tasks.existing(Test::class) {
-        testLogging.showStackTraces = true
-    }
-    val myCopy by tasks.registering(Copy::class) {
-        from("source")
-        into("destination")
-    }
-    ```
-
-### Extra Properties
-Access project or task-level extra properties via delegated properties:
-```kotlin
-// Define an extra property
-val myNewProperty by extra("initial value")
-
-// Read an existing extra property
-val myExtraProperty: String by extra
-```
-
-### Kotlin DSL Plugin (`kotlin-dsl`)
-This plugin is essential for developing build logic in Kotlin (e.g., in `buildSrc` or for convention plugins). It automatically applies the Kotlin plugin and adds necessary dependencies like `kotlin-stdlib` and `gradleKotlinDsl()`.
-
-```kotlin
-// buildSrc/build.gradle.kts
-plugins {
-    `kotlin-dsl`
-}
-
-repositories {
-    mavenCentral()
-}
-```
+**MOVED:** This file has been moved to `docs/01_Architecture/Reference/Tech_Stack/Gradle_Kotlin_DSL_Primer.md`.