PGx: full call detail (PGX-016..020, 027/028, 031), pgx coverage (PGX-009/035), full HGVS

- supporting_variants.tsv, unresolved_variants.tsv, variants_not_covered.tsv with PGX-026 metadata; per-allele
  supporting/unresolved sites for both alleles of every candidate; variant_change vs top, distant_alternative,
  unexplained_variants, alleles_impacted_by_no_call, alleles_tested.
- simurg pgx coverage: callable / not_covered / masked / equivalent_to per allele and manifest.
- HGVS on GRCh38 RefSeq accessions (NC_...:g.).

src/simurg/pgx/star.py

@@ -59,6 +59,7 @@ class Solution:
     raw_score: float = 0.0
     score: float = 0.0
     copy_number: int = 2
+    copies: tuple[int, ...] = ()  # haplotype index of every gene copy of the representative (SNV model)
 
     @property
     def genotype(self) -> str:
@@ -157,8 +158,8 @@ def call_gene(
                 p *= 2
             pri.append(p)
         best = members[int(np.argmax(pri))]
-        sols.append(Solution(cands[best][1], float(ll[best]), float(sum(pri)),
-                             [cands[k][1] for k in members], copy_number=cn if cn is not None else 2))  # fmt: skip
+        sols.append(Solution(cands[best][1], float(ll[best]), float(sum(pri)), [cands[k][1] for k in members],
+                             copy_number=cn if cn is not None else 2, copies=cands[best][0]))  # fmt: skip
     lls = np.array([s.ll for s in sols])
     lp = lls + np.log([s.prior for s in sols])
     raw = np.exp(lls - lls.max())