docs(overall_status): refine PA1/PA5 layout, add platform-ver admonition, fix label warnings

- PA1: render FR issue titles next to the issue number; restrict #549
  to Baselibs; add #757 'qualified json-parser' to Baselibs (no
  milestone); drop #914/#917 from Communication (local IPC scope only)
- PA5: drop per-module Platform Ver. Rpt column; add prominent
  Platform Verification Report admonition after the table
- PA5: split test counts onto a separate line-block line below the
  status emoji
- PA5: add reader notes for C0/C1 coverage source and Static/Dynamic
  analysis semantics
- Add cross-reference labels (overall_status_pa2..pa5) to fix six
  Sphinx 'undefined label' warnings from pi1/pi2/pi3
- custom.css: neutralise blockquote/line-block styling inside list
  tables so secondary lines blend into the cell; style new
  .platform-ver-report admonition

Sphinx build now reports 0 warnings, 0 errors.
SKILL.md updated to document all of the above (sections 4.0, 4.2,
5.0, 5.1, 5.2).

Author: antonkri

.github/skills/overall-status/SKILL.md

@@ -166,3 +166,67 @@ body.wide-content-page .bd-content .bd-article-container {
 .landing-grid .sd-card a:hover {
     color: #ffffff !important;
 }
+
+/* ---------------------------------------------------------------------------
+ * RST line-blocks inside list-tables (used in overall_status.rst PA cells):
+ * Sphinx wraps the indented "| ..." continuation in a <blockquote>, which
+ * adds a left border and a tinted background. Inside a status table we want
+ * those secondary lines (test counts, coverage values, links) to look like
+ * regular text — same color, no border, no inset background.
+ * ---------------------------------------------------------------------------*/
+
+table.docutils blockquote,
+table blockquote {
+    margin: 0 !important;
+    padding: 0 !important;
+    border: none !important;
+    background: transparent !important;
+    box-shadow: none !important;
+}
+
+table.docutils blockquote > div,
+table blockquote > div {
+    margin: 0 !important;
+    padding: 0 !important;
+}
+
+table.docutils .line-block,
+table .line-block {
+    margin: 0 !important;
+    padding: 0 !important;
+    border: none !important;
+    background: transparent !important;
+}
+
+table.docutils .line-block .line,
+table .line-block .line {
+    margin: 0 !important;
+    padding: 0 !important;
+    border: none !important;
+    background: transparent !important;
+}
+
+/* ---------------------------------------------------------------------------
+ * Platform Verification Report admonition (overall_status.rst PA5):
+ * make this single project-wide deliverable visually prominent.
+ * ---------------------------------------------------------------------------*/
+
+.admonition.platform-ver-report {
+    font-size: 1.15rem;
+    border-left: 6px solid #1a5fa8;
+    background-color: #eef4fb;
+    padding: 0.8rem 1rem;
+    margin: 1.2rem 0;
+}
+
+.admonition.platform-ver-report > .admonition-title {
+    font-size: 1.25rem;
+    font-weight: 700;
+    color: #1a5fa8;
+    margin-bottom: 0.3rem;
+}
+
+.admonition.platform-ver-report p {
+    margin: 0;
+    font-size: 1.1rem;
+}