feat(content): Our Methodology page template + footer link (v2.1.6)

- Add page-our-methodology.php — two-column ToC template for /our-methodology/
  Mirrors page-how-we-review.php; CSS classes use page-our-methodology prefix
  #last-verified anchor is deep-link target for Phase 2 verdict-card lines
- Footer section 5: add Our Methodology link between How We Review + Editorial Standards
- Bump version to 2.1.6

footer.php

@@ -57,6 +57,7 @@
 							echo '<ul>';
 							echo '<li><a href="' . esc_url( home_url( '/how-we-review-peptides' ) ) . '">' . esc_html__( 'How We Review Peptides', 'peptide-starter' ) . '</a></li>';
 							echo '<li><a href="' . esc_url( home_url( '/about' ) ) . '">' . esc_html__( 'Editorial Standards', 'peptide-starter' ) . '</a></li>';
+							echo '<li><a href="' . esc_url( home_url( '/our-methodology' ) ) . '">' . esc_html__( 'Our Methodology', 'peptide-starter' ) . '</a></li>';
 							echo '</ul>';
 						}
 					}