fix: resolve SERP provider abstract method issues and namespace collision

[claude]

Summary

This PR fixes critical code quality issues in the nodetool-core codebase:

Issue 1: Missing Abstract Method Implementation

• ApifyProvider and DataForSEOProvider were missing the search_raw abstract method from SerpProvider
• This caused test failures: TypeError: Can't instantiate abstract class without an implementation for abstract method 'search_raw'
• Fix: Added search_raw method that returns an appropriate error message indicating the method is not supported by these providers

Issue 2: Namespace Collision

• Two separate tools modules existed:
  • src/nodetool/agents/tools - Agent tools (BrowserTool, NodeTool, etc.)
  • src/nodetool/tools - MCP server tools (WorkflowTools, AssetTools, etc.)
• This caused mypy error: error: Duplicate module named "tools"
• Fix: Renamed src/nodetool/tools to src/nodetool/server_tools and updated all imports

Changes

1. Added search_raw method to ApifyProvider (src/nodetool/agents/serp_providers/apify_provider.py)

   • Returns error indicating Apify uses actor-based scraping instead of SerpAPI engines

2. Added search_raw method to DataForSEOProvider (src/nodetool/agents/serp_providers/data_for_seo_provider.py)

   • Returns error indicating DataForSEO uses its own API structure instead of SerpAPI engines

3. Renamed src/nodetool/tools to src/nodetool/server_tools

   • Eliminates namespace collision with src/nodetool/agents/tools
   • Updated ~96 imports across source and test files
   • Updated patch statements in test files

Test Plan

✅ All ApifyProvider tests pass (13 tests)
✅ DataForSEOProvider instantiation test passes
✅ Full test suite passes (3200+ tests)
✅ Ruff linting passes
⚠️ Pre-existing mypy error for _remove_base64_images.py (unrelated to this change)

Verification

# Run SERP provider tests
pytest tests/agents/serp_providers/test_apify_provider.py -v
pytest tests/agents/tools/test_serp_provider_selection.py::test_serp_provider_explicit_dataforseo -v

# Run linting
ruff check src/

# Run full test suite
pytest tests/ -x

🤖 Generated with Claude Code