Add ollama-local module: chat and embeddings against a real local Ollama server

- spring-ai-starter-model-ollama autoconfigures ChatModel/EmbeddingModel from
  spring.ai.ollama.* properties alone; no API key anywhere in this module.
- org.testcontainers:ollama and org.testcontainers:junit-jupiter were both
  renamed in the Testcontainers 2.x line -- to org.testcontainers:testcontainers-ollama
  and org.testcontainers:testcontainers-junit-jupiter respectively -- confirmed by
  reading the real testcontainers-bom-2.0.5.pom that Spring Boot 4.1.1 imports
  (spring-boot-dependencies -> testcontainers.version=2.0.5). The pre-rename
  artifact IDs still exist on Maven Central but are stuck on the 1.x line.
- Unlike every other module in this series, tests drive a real local model
  (qwen2.5:0.5b chat, all-minilm embeddings) via a Testcontainers-managed
  OllamaContainer started from a baked image (scripts/bake-image.sh), not a
  ScriptedChatModel -- the whole point of this post is a real model answering
  a real prompt.
- LocalChatAndEmbeddingTest forces a genuine cold state with Ollama's
  keep_alive: 0 option (set via ChatModel.call(Prompt) -- ChatClient.options()
  does not carry a keepAlive override through to the request in this version)
  and confirms the unload actually happened via /api/ps before measuring a
  reload, rather than trusting whichever call happens to run first.
- On this quiet sandbox host, even a confirmed-cold reload of the 500MB model
  came back in single-digit milliseconds once the underlying image layers were
  cached -- eval (generation) time dominates total latency here, not loading.
  Captured, not asserted as universal: readers get scripts/bake-image.sh to
  get their own numbers.
- Embedding dimension (384, all-minilm) asserted deterministically.

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01FtpJvZfg4nvLvtzgJTDWpB

ollama-local/src/main/java/com/ankurm/ollamalocal/OllamaLocalApplication.java

@@ -0,0 +1,19 @@
+package com.ankurm.ollamalocal;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * No {@code api-key} property anywhere in this module. {@code spring-ai-starter-model-ollama}
+ * autoconfigures a {@link org.springframework.ai.ollama.OllamaChatModel} and a
+ * {@link org.springframework.ai.ollama.OllamaEmbeddingModel} from {@code spring.ai.ollama.*}
+ * properties alone, talking to a local Ollama server over plain HTTP.
+ */
+@SpringBootApplication
+public class OllamaLocalApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(OllamaLocalApplication.class, args);
+	}
+
+}

ollama-local/src/main/java/com/ankurm/ollamalocal/config/ChatClientConfig.java

@@ -0,0 +1,22 @@
+package com.ankurm.ollamalocal.config;
+
+import org.springframework.ai.chat.client.ChatClient;
+import org.springframework.ai.chat.model.ChatModel;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * The {@link ChatModel} bean itself comes from Spring AI's Ollama autoconfiguration --
+ * nothing here constructs an {@code OllamaApi} or an {@code OllamaChatModel} by hand.
+ * This class only wraps whatever {@code ChatModel} autoconfiguration produced in a
+ * {@link ChatClient}, exactly like every other module in this series.
+ */
+@Configuration
+public class ChatClientConfig {
+
+	@Bean
+	ChatClient chatClient(ChatModel chatModel) {
+		return ChatClient.builder(chatModel).build();
+	}
+
+}