fix(database): remove unicity constraint and property text limit

[evebrnd]

PR Description

What this PR Provides

• Change property.value to TEXT, previous VARCHAR(255) is too short for properties like description
• Remove constraint UNIQUE (template_identifier, name) that prevented multiple entities from sharing the same display name within a template

Review

• The reviewer has tested the feature
• The reviewer has reviewed the implementation of the feature
• The documentation has been updated
• The feature implementation respects the Technical Doc / ADR previously produced

How to test

• Verify flyway script runs successfully
• Create an entity with the same name as an existing one

Breaking changes

N/A

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud