bump gradle to 9.0.0 to jdk25 compatibility

Author: MarketDataDev03

CLAUDE.md

@@ -27,7 +27,7 @@ These decisions are not up for debate without amending the corresponding ADR:
 - **Java only.** Single artifact, no Kotlin sources. Published JAR must not bring `kotlin-stdlib` as a transitive dep. JSpecify is compile-time only and doesn't count. (ADR-001)
 - **Kotlin consumers are first-class via interop, not via a Kotlin artifact.** A separate `marketdata-sdk-java-kotlin` extensions JAR (Option E) is deferred. (ADR-001)
 - **JDK 17 minimum.** Build with `javac --release 17`; no multi-release JAR. CI test matrix is `{17, 21, 25}` for forward-compat. (ADR-002)
-- **Gradle 8.14, Kotlin DSL.** `build.gradle.kts`, `settings.gradle.kts`, version catalog at `gradle/libs.versions.toml`. Wrapper pinned to **Gradle 8.14** (the minimum that supports JDK 25 as a toolchain target — 8.12 had this version cap and 9.0+ would also work but adds breaking changes we don't need yet). The daemon itself runs on JDK 17 via `JAVA_HOME`; toolchain forks compile/test JDKs as needed. Standard plugins: `java-library`, `maven-publish`, Vanniktech Maven Publish (or Gradle Nexus Publish), Spotless, JaCoCo. Integration tests live in a separate `integrationTest` source set, env-var-gated. (ADR-003)
+- **Gradle 9.0, Kotlin DSL.** `build.gradle.kts`, `settings.gradle.kts`, version catalog at `gradle/libs.versions.toml`. Wrapper pinned to **Gradle 9.0.0** — the first release that supports **JDK 25** for both daemon and toolchain (8.x maxed at JDK 24). The daemon still runs on JDK 17 via `JAVA_HOME` for stability (CI workflows order `setup-java`'s `java-version` so the matrix JDK is first and 17 is last); toolchain forks compile/test JDKs as needed via `-PtestJdk=N`. Standard plugins: `java-library`, `maven-publish`, Vanniktech Maven Publish (or Gradle Nexus Publish), Spotless, JaCoCo. Integration tests live in a separate `integrationTest` source set, env-var-gated. (ADR-003)
 - **`java.net.http.HttpClient` exclusively.** No third-party HTTP client (OkHttp, Apache) as a runtime dep — ever. HTTP/2 on (default). One shared `HttpClient` per `MarketDataClient`. Timeouts: 99s request, 2s connect. (ADR-004)
 - **Jackson (`jackson-databind`) for JSON.** Records-based response models (Jackson record support, 2.12+). The API's parallel-arrays wire format (e.g. `{"s":"ok","symbol":["AAPL","MSFT"],"price":[150.0,400.0]}`) is decoded via custom `JsonDeserializer` classes, *not* default reflection. Jackson is **not shaded** in v1; shading is held in reserve. (ADR-005)
 - **Sync + async parity per endpoint.** Every public endpoint exposes both `quote(...)` and `quoteAsync(...)`; async returns `CompletableFuture<T>`. **Internal logic is async-first.** Sync methods are thin wrappers that call `.join()` and unwrap `CompletionException` to surface the underlying cause directly. Both surfaces share validation, retry, rate-limit, and concurrency-pool logic — no parallel implementations. Tests must cover both variants for every endpoint. (ADR-006)

gradle/wrapper/gradle-wrapper.jar

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.14-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.0.0-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME