[liunyl]

Summary by CodeRabbit

• New Features

  • Optional library build mode (BUILD_ELOQSQL_AS_LIBRARY)
  • Optional DynamoDB integration (WITH_DYNAMO_DB)
  • Added a new CircularQueue data type for improved internal queuing

• Chores

  • Reorganized build and packaging paths to support converged library/executable workflows
  • Centralized data-substrate configuration for tests and runtime
  • Streamlined storage/log/tx service wiring and test fixtures across the project

---

Note

Integrates the new data_substrate across server and storage, adds a library build mode, and updates build/test/scripts to the new paths and config flow.

• Build/Packaging:
  • Add BUILD_ELOQSQL_AS_LIBRARY to build eloqsql as a library; export sql/sql_builtins and make mariadbd optional.
  • Replace ${CMAKE_SOURCE_DIR} usages with ${ELOQSQL_SOURCE_DIR}/${ELOQSQL_BINARY_DIR}; update install/CPack, ABI, dtrace, RPM/DEB packaging, tags, and tests.
  • Add WITH_DYNAMO_DB option.
• Submodules/Structure:
  • Replace storage/eloq/* submodules with data_substrate/* submodules; add data_substrate submodule.
• Server Integration:
  • Link sql with data_substrate; add DATA_SUBSTRATE_LIB to deps.
  • Initialize/Shutdown via DataSubstrate in mysqld/storage; introduce --eloqsql_config and gflags-based parsing.
  • Refactor storage engine to use DataSubstrate APIs; rename internal headers to eloqsql_*.
• Code Additions:
  • Add reusable sql/circular_queue.h.
• CI/Scripts/Tests:
  • Update concourse scripts and MTR configs to use data_substrate paths and centralized config files; remove obsolete eloq-specific test includes.
  • Minor: add .cursor/ to .gitignore.

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