refactor(model): move DashScope/Ollama model provider from core to extensions module

[jujn]

Summary

This PR continues the model adapter modularization work by moving DashScope and Ollama model implementations out of agentscope-core into dedicated agentscope-extensions-model-* modules. It also moves the former core E2E test suite into a new model-extension E2E test module, and adds .editorconfig to enforce UTF-8 without BOM.

Major Changes

DashScope model extension

• Added agentscope-extensions-model-dashscope.
• Moved DashScope chat model, HTTP client, encryption utilities, endpoint enum, credential, formatter, DTOs, and DashScopeMultiModalTool from core into the new extension module.
• Added DashScopeModelProvider SPI registration.
• Supports:
  • dashscope:.+
  • short Qwen model ids matching qwen.+
• Removed DashScope built-in factory logic and dashscope-sdk-java dependency from core.
• Updated Spring Boot starter, scheduler, studio telemetry, examples, and RAG simple imports/dependencies.
• Added baseUrl support to DashScope Spring Boot properties and related tests.

Ollama model extension

• Added agentscope-extensions-model-ollama.
• Moved Ollama chat model, HTTP client, credential, formatter, DTOs, and options from core into the new extension module.
• Added OllamaModelProvider SPI registration.
• Supports ollama:.+ via SPI.
• Removed Ollama built-in factory logic from core.
• Updated RAG simple embedding code/tests to reuse the Ollama extension module.

Core cleanup

• Removed remaining built-in model factory infrastructure from ModelRegistry.
• ModelRegistry now resolves named models, user-registered factories, and SPI providers only.
• Updated ModelRegistryTest and credential tests accordingly.
• Removed stale core E2E compiler exclusion from agentscope-core/pom.xml.
• Kept shared model context window metadata in core.

E2E test migration

• Added agentscope-extensions-model-e2e-tests.
• Moved the former io.agentscope.core.e2e test suite into the new model-extension E2E module.
• Moved DashScope multimodal tool E2E coverage under the DashScope extension package.
• Copied required E2E resources into the new module.
• E2E tests remain disabled by default and require ENABLE_E2E_TESTS=true plus provider API keys.

Packaging and downstream updates

• Added DashScope/Ollama modules to the model extension aggregator, distribution BOM, and all-in-one artifact where appropriate.
• Added the E2E test module only to the model extension aggregator, not to distribution artifacts.
• Updated documentation examples and affected example modules to use extension packages.
• Added .editorconfig with UTF-8 settings to avoid UTF-8 BOM regressions.

Provider consistency

• Updated OpenAI, Gemini, Anthropic, DashScope, and Ollama model providers to validate supports(modelId) in create. Standardized provider matching to use Pattern.matcher(modelId).matches().

[codecov]

Codecov Report

❌ Patch coverage is 45.67901% with 44 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...gentscope/spring/boot/model/ModelProviderType.java	62.50%	8 Missing and 1 partial ⚠️
...nsions/model/dashscope/DashScopeModelProvider.java	46.66%	7 Missing and 1 partial ⚠️
...e/extensions/model/ollama/OllamaModelProvider.java	36.36%	6 Missing and 1 partial ⚠️
...ons/model/dashscope/DashScopeChatModelFactory.java	0.00%	6 Missing ⚠️
...xtensions/model/ollama/OllamaChatModelFactory.java	0.00%	4 Missing ⚠️
...e/core/tracing/telemetry/AttributesExtractors.java	0.00%	4 Missing ⚠️
...pe/spring/boot/properties/DashscopeProperties.java	33.33%	2 Missing ⚠️
...n/java/io/agentscope/core/model/ModelRegistry.java	50.00%	0 Missing and 1 partial ⚠️
...nsions/model/anthropic/AnthropicModelProvider.java	75.00%	0 Missing and 1 partial ⚠️
...e/extensions/model/gemini/GeminiModelProvider.java	75.00%	0 Missing and 1 partial ⚠️
... and 1 more

📢 Thoughts on this report? Let us know!