feat: [DevOps] Add minimal dependencies check (#388)

.github/workflows/continuous-integration.yaml

@@ -82,6 +82,11 @@ jobs:
           MVN_ARGS="${{ env.MVN_MULTI_THREADED_ARGS }} org.jacoco:jacoco-maven-plugin:prepare-agent surefire:test org.jacoco:jacoco-maven-plugin:report org.jacoco:jacoco-maven-plugin:check@default-check"
           mvn $MVN_ARGS
 
+      - name: "Check Minimal Dependencies"
+        run: |
+          MVN_ARGS="${{ env.MVN_MULTI_THREADED_ARGS }} ${{ env.MVN_SKIP_CI_PLUGINS }} clean test -P floor-deps"
+          mvn $MVN_ARGS
+
       - name: "Slack Notification"
         if: ${{ github.ref == 'refs/heads/main' && failure() }}
         uses: slackapi/slack-github-action@v4.0.0

docs/release_notes.md

@@ -8,7 +8,7 @@
 
 ### 🔧 Compatibility Notes
 
--
+- The SDK is verified to build against these minimum supported dependency versions: SAP Cloud SDK `5.28.0`, Jackson `2.18.0`, Apache HttpComponents `5.4.2`, SLF4J `2.0.0`, Spring AI `1.1.0` (optional).
 
 ### ✨ New Functionality
 

pom.xml

@@ -117,6 +117,14 @@
     <!--  Binary compatibility check old/new version file -->
     <japicmp.oldVersion.file>/tmp/baseline.jar</japicmp.oldVersion.file>
     <japicmp.newVersion.file>${project.build.directory}/${project.build.finalName}.jar</japicmp.newVersion.file>
+    <!-- Minimum supported versions of consumer-facing dependencies, verified by the 'floor-deps' profile -->
+    <floor.cloud-sdk.version>5.28.0</floor.cloud-sdk.version>
+    <floor.jackson.version>2.18.0</floor.jackson.version>
+    <!-- Coupled to the Cloud SDK floor: SAP Cloud SDK 5.28.0 calls HttpClient5 5.4+ APIs at runtime -->
+    <floor.httpcomponents-core5.version>5.4.2</floor.httpcomponents-core5.version>
+    <floor.httpcomponents-client5.version>5.6</floor.httpcomponents-client5.version>
+    <floor.slf4j.version>2.0.0</floor.slf4j.version>
+    <floor.spring-ai.version>1.1.0</floor.spring-ai.version>
   </properties>
 
   <dependencyManagement>
@@ -998,6 +1006,65 @@ https://gitbox.apache.org/repos/asf?p=maven-pmd-plugin.git;a=blob_plain;f=src/ma
     </plugins>
   </build>
   <profiles>
+    <profile>
+      <!-- Verify the SDK still compiles against the minimum supported dependency versions (floor.* properties).
+           Run with: mvn test -P floor-deps -->
+      <id>floor-deps</id>
+      <dependencyManagement>
+        <dependencies>
+          <dependency>
+            <groupId>com.sap.cloud.sdk</groupId>
+            <artifactId>sdk-bom</artifactId>
+            <version>${floor.cloud-sdk.version}</version>
+            <type>pom</type>
+            <scope>import</scope>
+          </dependency>
+          <!-- optional integration: spring-ai is declared optional in module poms, but still compiled -->
+          <dependency>
+            <groupId>org.springframework.ai</groupId>
+            <artifactId>spring-ai-bom</artifactId>
+            <version>${floor.spring-ai.version}</version>
+            <type>pom</type>
+            <scope>import</scope>
+          </dependency>
+          <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>${floor.jackson.version}</version>
+          </dependency>
+          <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-core</artifactId>
+            <version>${floor.jackson.version}</version>
+          </dependency>
+          <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-annotations</artifactId>
+            <version>${floor.jackson.version}</version>
+          </dependency>
+          <dependency>
+            <groupId>org.apache.httpcomponents.core5</groupId>
+            <artifactId>httpcore5</artifactId>
+            <version>${floor.httpcomponents-core5.version}</version>
+          </dependency>
+          <dependency>
+            <groupId>org.apache.httpcomponents.core5</groupId>
+            <artifactId>httpcore5-h2</artifactId>
+            <version>${floor.httpcomponents-core5.version}</version>
+          </dependency>
+          <dependency>
+            <groupId>org.apache.httpcomponents.client5</groupId>
+            <artifactId>httpclient5</artifactId>
+            <version>${floor.httpcomponents-client5.version}</version>
+          </dependency>
+          <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+            <version>${floor.slf4j.version}</version>
+          </dependency>
+        </dependencies>
+      </dependencyManagement>
+    </profile>
     <profile>
       <id>non-release</id>
       <activation>