CCM-14200 - Move models to reusable workspace

[mjewildnhs]

Description

Move models (under client-transform-lambda) out to standalone private node package.

Context

Paving way for reuse by mock-client lambda and integration tests.

Type of changes

• Refactoring (non-breaking change)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would change existing functionality)
• Bug fix (non-breaking change which fixes an issue)

Checklist

• I am familiar with the contributing guidelines
• I have followed the code style of the project
• I have added tests to cover my changes
• I have updated the documentation accordingly
• This PR is a result of pair or mob programming
• If I have used the 'skip-trivy-package' label I have done so responsibly and in the knowledge that this is being fixed as part of a separate ticket/PR.

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Sensitive Information Declaration

To ensure the utmost confidentiality and protect your and others privacy, we kindly ask you to NOT including PII (Personal Identifiable Information) / PID (Personal Identifiable Data) or any other sensitive data in this PR (Pull Request) and the codebase changes. We will remove any PR that do contain any sensitive information. We really appreciate your cooperation in this matter.

• I confirm that neither PII/PID nor sensitive data are included in this PR and the codebase changes.

[rhyscoxnhs]

LGTM

[Copilot]

Pull request overview

Refactors the codebase to extract shared “models” (types/constants for client callbacks) into a standalone private npm workspace package to enable reuse by other lambdas/tests.

Changes:

• Adds a new workspace package at src/models containing the shared model types and constants, with a barrel index.ts.
• Updates model source files to use relative imports and adjusts ESLint rules to permit them within src/models/src/**.
• Updates repo/workspace configuration (root workspaces, Sonar exclusions) and adjusts README wording around event namespaces.

Reviewed changes

Copilot reviewed 15 out of 18 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
tsconfig.json	Removes the root tsconfig (repo now relies on per-workspace tsconfigs).
src/models/tsconfig.json	Adds a dedicated TS config for the new models workspace.
src/models/src/status-types.ts	Moves/maintains shared status union types in the models package.
src/models/src/status-publish-event.ts	Converts imports/exports to relative paths within the models package.
src/models/src/routing-plan.ts	Introduces a shared RoutingPlan interface.
src/models/src/message-status-data.ts	Converts imports to relative paths within the models package.
src/models/src/index.ts	Adds a barrel export surface for the models package.
src/models/src/client-config.ts	Moves/maintains subscription configuration types in the models package.
src/models/src/client-callback-payload.ts	Converts imports to relative paths within the models package.
src/models/src/channel-types.ts	Moves/maintains shared channel union type in the models package.
src/models/src/channel-status-data.ts	Converts imports to relative paths within the models package.
src/models/package.json	Defines the new private workspace package metadata/scripts/exports.
scripts/config/sonar-scanner.properties	Excludes src/models/** from Sonar coverage/CPD.
package.json	Adds src/models to npm workspaces.
package-lock.json	Updates lockfile for the added workspace package.
lambdas/client-transform-filter-lambda/src/tests/models/status-publish-event.test.ts	Removes a unit test that asserted EventTypes constant values.
eslint.config.mjs	Disables the no-relative-import-paths rule for src/models/src/**.
README.md	Replaces specific event namespace text with uk.nhs.notify... placeholders.

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