Strip rationale-history comments from JDK 25 references

.github/workflows/backend-build.yml

@@ -18,9 +18,6 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        # JDK 25 is the floor: JPDFium's published artifacts require
-        # org.gradle.jvm.version=25 (FFM is final at 22+, JPDFium picked 25
-        # as its source target). Earlier JDKs can't even resolve the dep.
         jdk-version: [25]
         spring-security: [true, false]
     steps:

AGENTS.md

@@ -431,7 +431,7 @@ The frontend is organized with a clear separation of concerns:
 
 ## Important Notes
 
-- **Java Version**: Requires JDK 25 (raised from 21 to support JPDFium's FFM bindings, which target `org.gradle.jvm.version=25`).
+- **Java Version**: Requires JDK 25.
 - **Lombok**: Used extensively - ensure IDE plugin is installed
 - **File Persistence**:
   - **Backend**: Designed to be stateless - files are processed in memory/temp locations only

DeveloperGuide.md

@@ -45,7 +45,7 @@ This guide focuses on developing for Stirling 2.0, including both the React fron
 - [Task](https://taskfile.dev/installation/) — unified command runner (recommended)
 - Docker
 - Git
-- Java JDK 25 (required — JPDFium FFM bindings target JVM 25)
+- Java JDK 25
 - Node.js 18+ and npm (required for frontend development)
 - Gradle 7.0 or later (Included within the repo)
 - [uv](https://docs.astral.sh/uv/) — Python package manager (required for engine development)

build.gradle

@@ -32,10 +32,7 @@ ext {
     logback = "1.5.32"
     // junit-platform-launcher version managed by Spring Boot BOM
     // modernJavaVersion drives javac --release and the restart-helper
-    // compile target. Bumped from 21 to 25 because JPDFium publishes with
-    // org.gradle.jvm.version=25 (FFM is finalized at 22+, JPDFium picks 25
-    // as its source target). Anything < 25 fails Gradle's variant attribute
-    // match at compile time.
+    // compile target.
     modernJavaVersion = 25
 }