Update stock-assessment CSL citation formatting

[Copilot]

What is the feature?

• Adjust stock-assessment citations in cjfas.csl so affected @techmemo entries render with author-year in-text citations and a stock-assessment-specific reference format.
• This changes the bibliography output to Authors. Year. Title. Publishing office. # p. Accessible at ... and removes the publisher-based in-text author surrogate.

How have you implemented the solution?

• CSL citation behavior
  • Removed the stock-assessment override in author-short, so in-text citations now use author names and standard author-date et-al behavior.
  • Updated the stock-assessment bibliography branch to emit:

    <group delimiter=". ">
      <text macro="author"/>
      <text macro="issued-year"/>
      <text variable="title"/>
      <text variable="publisher"/>
      <text variable="number-of-pages" suffix=" p."/>
      <text macro="stock-assessment-access"/>
    </group>

• Focused test coverage
  • Updated the existing CSL test to assert the new stock-assessment bibliography structure and confirm the old publisher-only special case is no longer present.

Does the PR impact any other area of the project, maybe another repo?

• No expected impact outside citation rendering for the stock-assessment report path in cjfas.csl.

• Fixes [Feature]: change SAR citation #546