Make SQL table creation scripts idempotent to support redeployment

[Copilot]

Database deployments fail on rerun with "object already exists" errors, preventing iterative updates and CI/CD workflows.

Changes

18 SQL table scripts modified to use existence checks:

• Main artifacts: DeploymentComponents/azure_sql_artifacts/tables/ (8 files)
• Consumer artifacts: beneficial_ownership, generic, acts (10 files)

Pattern applied:

-- Before
CREATE TABLE [dbo].[IngestedSourceDataAudit](...);
GO
ALTER TABLE [dbo].[IngestedSourceDataAudit] ADD CONSTRAINT [DF_ValidFrom] ...;
GO

-- After
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[IngestedSourceDataAudit]') AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[IngestedSourceDataAudit](...);

IF NOT EXISTS (SELECT * FROM sys.default_constraints WHERE name = 'DF_ValidFrom' AND parent_object_id = OBJECT_ID('[dbo].[IngestedSourceDataAudit]'))
BEGIN
ALTER TABLE [dbo].[IngestedSourceDataAudit] ADD CONSTRAINT [DF_ValidFrom] ...;
END
END
GO

Handles temporal tables with SYSTEM_VERSIONING, primary keys, and default constraints. Stored procedures already use CREATE OR ALTER and require no changes.

Documentation

Updated azure_sql_artifacts/README.md to document idempotent deployment capability.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Database deployment not working</issue_title>
<issue_description>Hello

I'm trying to deploy the solution however, when I try to update changes in the SQL database I have the following error

There is already an object named 'IngestedSourceDataAudit' in the database.

Is the solution not intended to ongoing updates?</issue_description>

<agent_instructions>Assess the reasons for the user getting the 'There is already an object named 'IngestedSourceDataAudit' in the database' . error when trying to deploy the solution. </agent_instructions>

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

• Fixes Database deployment not working #42

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