feat(dotAI): Dot AI LangChain4J - Anthropic

[ihoffmann-dot]

Summary

Adds Anthropic as a supported provider, talking directly to the Anthropic Messages
API with an API key — distinct from accessing Claude models through AWS Bedrock,
which requires AWS infrastructure and IAM credentials.

• Add langchain4j-anthropic dependency (version via langchain4j BOM)
• Add AnthropicModelProviderStrategy registered in LangChain4jModelFactory.STRATEGIES
• Chat + streaming chat via AnthropicChatModel / AnthropicStreamingChatModel
• Embeddings and image throw UnsupportedOperationException (Anthropic has no such APIs)
• endpoint config field overrides the default base URL (proxies/gateways)
• Add 8 unit tests in LangChain4jModelFactoryTest

Configuration

{
  "chat": {
    "provider": "anthropic",
    "model": "claude-sonnet-4-6",
    "apiKey": "sk-ant-...",
    "maxTokens": 4096,
    "temperature": 0.7
  }
}

Notes

• Model IDs use the Anthropic form: claude-sonnet-4-6, claude-opus-4-8, claude-haiku-4-5.
• maxRetries is not supported by the streaming chat model and is ignored with a warning (same behavior as the OpenAI provider).

Related Issue

This PR fixes #36135
EPIC: dotAI Multi-Provider Support #33970

[claude]

Claude finished @ihoffmann-dot's task in 48s —— View job

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Rollback Safety Analysis

• Read rollback-unsafe categories reference
• Get full PR diff
• Analyze diff against unsafe categories
• Apply appropriate label

Result: ✅ Safe to Roll Back

Checked all categories — none apply:

Category	Finding
C-1 Structural Data Model	No DB schema changes
C-2 ES Mapping	No ES mapping changes
C-3 Content JSON Model Version	No CURRENT_MODEL_VERSION bump
C-4 DROP TABLE/COLUMN	No drops
H-1 One-Way Data Migration	No runonce migration tasks
H-2 RENAME TABLE/COLUMN	No renames
H-3 PK Restructuring	No PK changes
H-4 New Content Type Field Type	No new field types
H-5 Binary Storage Provider	No storage provider changes
H-6 DROP PROCEDURE/FUNCTION	No procedure drops
H-7 NOT NULL column without default	No DB columns added
H-8 VTL Viewtool Contract	No viewtool changes
M-1 Non-Broadening Column Type	No column type changes
M-2 Push Publishing Bundle Format	No bundle format changes
M-3 REST/GraphQL API Contract	No API contract changes
M-4 OSGi Plugin API	No OSGi interface changes

This PR adds only: a new Maven dependency (langchain4j-anthropic), a new package-private Java class implementing an existing internal interface, Javadoc updates, and unit tests. Rolling back to N-1 simply removes the Anthropic provider — no data, mappings, or external contracts are affected.

[github-actions]

🤖 Codex Review — openai.gpt-5.5

**[> [🟡 Medium] dotCMS/pom.xml:517 — New dependency is added directly to dotCMS/pom.xml without a corresponding change in bom/application/pom.xml. dotCMS convention requires dependency version management to be added in bom/application/pom.xml only; if this artifact is not already managed, Maven builds will fail or dependency resolution will be inconsistent.

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_{Run: #27393355787 · tokens: in: 3665 · out: 605 (reasoning: 516) · total: 4270}