Update DAB to version 2.0

[Copilot]

Why make this change?

Strategic version bump to align with upcoming breaking changes and new features. Signals major release to consumers and integrators.

What is this change?

Version updated from 1.7 to 2.0 in src/Directory.Build.props. This propagates to all assemblies via the build system and is reflected in:

• CLI version output via ProductInfo.GetProductVersion()
• Assembly metadata
• User-agent strings in database connections
• Health endpoint responses

How was this tested?

• Integration Tests
• Unit Tests

Verified via:

dotnet run --project src/Cli/Cli.csproj --framework net8.0 -- --version
# Output: Microsoft.DataApiBuilder 2.0+<commit-hash>

Sample Request(s)

CLI:

dab --version
# Returns: Microsoft.DataApiBuilder 2.0+<commit-hash>

Health endpoint (after release):

GET /health
# Response includes: "version": "2.0.0"

Original prompt

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This section details on the original issue you should resolve

<issue_title>Update DAB to major version 2, minor version 0</issue_title>
<issue_description>We need to update the major version of Data API builder (DAB) to 2 and the minor version to 0. This aligns DAB's versioning strategy for upcoming features and fixes.

Impact

• Consumers and integrators will need to adjust for the new major release.
• Documentation and internal references will need updating.

Requested Actions

• Increase DAB's major version to 2 and minor version to 0.
• Review and update version references throughout documentation and codebase.
• Ensure version bump complies with release checklist.

Additional context

This change is for strategic alignment with new features and breaking changes expected in future releases.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Update DAB to major version 2, minor version 0 #3118

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