Serve storage abstraction and SQLite storage for Serve conversations

[TesAnti]

Summary by CodeRabbit

• New Features

  • Introduced new projects for abstractions and integration tests.
  • Added conversation management and messaging features to the SQLite database.
  • Introduced an enum for identifying message authors.

• Refactor

  • Updated namespaces and imports across various files to align with new project structures.
  • Adjusted project settings and target frameworks for better integration and packaging.

• Tests

  • Added integration tests for conversation functionality using SQLite.

[coderabbitai]

Walkthrough

The recent updates to the LangChain solution bring new abstractions and integration tests, enhancing SQLite database functionality and restructuring the Serve module. Changes include adding projects, updating project references, and standardizing namespaces across files to match the new architecture.

Changes

Files	Change Summary
LangChain.sln, .../LangChain.Databases.Sqlite.IntegrationTests.csproj	Added new projects and integration tests for SQLite.
.../LangChain.Databases.Sqlite.csproj, .../LangChain.Serve.csproj	Updated project references and target frameworks.
.../SQLiteConversationRepository.cs, .../ServeConversationsTests.cs	Introduces new functionality for SQLite conversation management and related tests.
.../Serve/Abstractions/..., .../Serve/src/...	Renamed namespaces and adjusted imports in Serve module files to align with new abstractions.

🐰✨
Code hops and leaps, across the field wide,
New paths we pave, with namespaces aligned.
Abstractions grow, like daisies in spring,
Tests ensure, our code does sing.
🌼📜🚀

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Recent Review Details

Configuration used: CodeRabbit UI

Commits

Files that changed from the base of the PR and between 9a1bf4c and 7906a3d.

Files selected for processing (1)

• src/Databases/Sqlite/src/ServeExtensions.cs (1 hunks)

Files skipped from review as they are similar to previous changes (1)

• src/Databases/Sqlite/src/ServeExtensions.cs

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[sweep-ai]

Apply Sweep Rules to your PR?

• Apply: All new business logic should have corresponding unit tests.
• Apply: Refactor large functions to be more modular.
• Apply: Add docstrings to all functions and file headers.

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[coderabbitai]

Actionable comments posted: 1

[coderabbitai]

Actionable comments posted: 1