fix(comms): refactor wsdl generation to use minOccurs

[jeclrsg]

• refactors the wsdl->ts generation utility to respect the "minOccurs" properties in WSDL definitions
• exposes an optional "abortSignal" param to all service endpoints, so that consumers can define their own AbortSignals and they be passed thru to ESPConnection.send(...)
• tightens up several instances of looser typing

Checklist:

• The commit message is properly formatted and free of typos.
  • The commit message title makes sense in a changelog, by itself.
  • The commit message includes a "fixes" reference if appropriate.
  • The commit is signed.
• The change has been fully tested:
  • I have viewed all related gallery items
  • I have viewed all related dermatology items
• There are no similar instances of the same problem that should be addressed
  • I have addressed them here
  • I have raised new issues to address them separately

Testing:

[Copilot]

Pull request overview

Refactors the WSDL→TS generation utility to derive optional request/response fields from WSDL minOccurs="0" rather than making all request fields optional, and extends generated service endpoints to accept an optional abortSignal.

Changes:

• Added schema/node typing helpers and optional-field extraction based on minOccurs.
• Updated type-definition parsing to consult schema nodes (including inline complexTypes) and record optional properties per generated type.
• Updated generated service methods to accept abortSignal?: AbortSignal and forward it to _connection.send(...).

[GordonSmith]

Shouldn't you regenerate all the stubs to ensure all the tests still pass?