Remove excess logs in dab validate command

[RubenCerna2079]

Why make this change?

• Solves issue [Bug]: dab validate outputs too much #3266

What is this change?

Remove excessive logs when the user uses dab validate.
This includes:

• Removing unnecessary one-liner information logs
• Reducing warning logs so that only more general warnings appear (e.g. logs related to entities missing field descriptions when using MCP)
• Only showing certain relevant information logs when the user uses dab start. All of this is done in order to ensure that the logs in dab validate are not cluttered. (e.g. logs related to REST paths for entities when enabled)
• Removed logs assertion in tests that used it, as those logs were removed.

How was this tested?

• Integration Tests
• Unit Tests
• Manual Tests
  Tested manually by running dab validate and seeing that the logs are as expected, and ran dab start to ensure previous logs didn't change.

Sample Request(s)

Previous dab validate logs:

New dab validate logs:

[Copilot]

Pull request overview

This PR reduces console logging noise during dab validate by removing or downgrading several informational logs emitted during schema validation and metadata initialization, and adjusts tests that previously asserted on those removed logs.

Changes:

• Suppressed per-entity REST path logs and other informational messages during validate-only execution paths.
• Consolidated MCP “missing fields” warnings into a single warning (with per-entity details moved to Debug).
• Updated Service tests to stop asserting on removed informational logs.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/Service.Tests/Configuration/ConfigurationTests.cs	Removes assertions that expected now-removed schema validation info logs.
src/Core/Services/MetadataProviders/SqlMetadataProvider.cs	Skips REST-path/per-entity REST-disabled info logs when running in validate-only mode.
src/Core/Services/MetadataProviders/MsSqlMetadataProvider.cs	Skips trigger/REST-path info logs in validate-only mode; reduces validate output noise.
src/Core/Configurations/RuntimeConfigValidator.cs	Removes an informational “Validating entity relationships.” log during validate-only runs.
src/Core/Configurations/JsonConfigSchemaValidator.cs	Removes an informational “schema satisfied” log on successful schema validation.
src/Cli/ConfigGenerator.cs	Removes “Validating config file” info log; consolidates MCP missing-fields warnings (per-entity -> Debug, plus one Warning).
src/Cli/Commands/ValidateOptions.cs	Changes invalid-config final message from Error to Information.

[aaronburtle]

This PR removes assertions but doesnt add in any new ones, could consider adding in a negative case that asserts the suppressed logs are absent when isValidateOnly is true to help prevent any regression.

[aaronburtle]

Looks good, just a couple comments.

[RubenCerna2079]

This PR removes assertions but doesnt add in any new ones, could consider adding in a negative case that asserts the suppressed logs are absent when isValidateOnly is true to help prevent any regression.

Added new test to ensure suppressed logs are absent when isValidateOnly is true

[souvikghosh04]

the downgrading of LogError to LogInformation can have some impact on users. we should check this.

[souvikghosh04]

Approving, as the comments have been addressed