fix(#2769): tolerate Requirements header with colon inside bold delimiters (#2782)

* fix(#2769): tolerate Requirements header with colon inside bold delimiters

extractReqIds in sdk/src/query/init.ts and the legacy init.cjs port only
matched `**Requirements**:` (colon outside bold), so phases declared with
the equally-valid markdown form `**Requirements:**` (colon inside bold,
which is what the project's own templates emit) returned phase_req_ids:
null for both `init plan-phase` and `init execute-phase`.

The mirror-image bug in `phase complete`'s REQUIREMENTS.md traceability
sweep at get-shit-done/bin/lib/phase.cjs:871 only matched the inside-bold
form, silently skipping the REQ-ID checkbox flips for any roadmap that
used the outside-bold form. Both parsers now share the same canonical
regex that accepts all three rendered-identical variants:

  **Requirements:**     (colon inside bold)
  **Requirements**:     (colon outside bold)
  **Requirements** :    (space before outside colon)

Tests:
- tests/init.test.cjs — parameterized over the three header variants for
  both init plan-phase and init execute-phase (6 new behavioral cases).
- sdk/src/query/init.test.ts — describe.each over the same variants
  exercising initPlanPhase through the SDK.
- tests/bug-2769-requirements-header-variants.test.cjs — phase complete
  flips REQ-001 in REQUIREMENTS.md across all three header variants.

Closes #2769

* refactor(#2769): centralize REQUIREMENTS_HEADER_RE constant per CodeRabbit

sdk/src/query/init.ts

@@ -203,7 +203,12 @@ async function getPhaseInfoForVerifyWork(
  */
 function extractReqIds(roadmapPhase: Record<string, unknown> | null): string | null {
   const section = roadmapPhase?.section as string | undefined;
-  const reqMatch = section?.match(/^\*\*Requirements\*\*:[^\S\n]*([^\n]*)$/m);
+  // Accept all bold/colon variants of the Requirements header. The forms
+  //   **Requirements:**  (colon inside bold)
+  //   **Requirements**:  (colon outside bold)
+  //   **Requirements** : (space before outside colon)
+  // render identically in markdown but differ textually. Issue #2769.
+  const reqMatch = section?.match(/^\*\*Requirements:?\*\*[^\S\n]*:?[^\S\n]*([^\n]*)$/m);
   const reqExtracted = reqMatch
     ? reqMatch[1].replace(/[\[\]]/g, '').split(',').map((s: string) => s.trim()).filter(Boolean).join(', ')
     : null;