Add genotype filters for VCF genotype field reserved key FT

src/main/resources/avro/bdg.avdl

@@ -767,7 +767,7 @@ record Genotype {
 
   /**
    One or more allele values encoding this genotype. If this genotype is phased, the order of
-   the allele values is significant. VCF genotype field reserved key "GT" mapped to Allele enum
+   the allele values is significant. VCF genotype field reserved key GT mapped to Allele enum
    values.
    */
   array<Allele> alleles = [];
@@ -777,6 +777,22 @@ record Genotype {
    reserved key "GT" allele separators: '|' genotype is phased; '/' genotype is unphased.
    */
   union { boolean, null } phased = false;
+
+  /**
+   True if filters were applied for this variant. VCF genotype field reserved key FT any
+   value other than the missing value.
+   */
+  union { null, boolean } filtersApplied = null;
+
+  /**
+   True if all filters for this variant passed. VCF genotype field reserved key FT value PASS.
+   */
+  union { null, boolean } filtersPassed = null;
+
+  /**
+   Zero or more filters that failed for this variant. VCF genotype field reserved key FT.
+   */
+  array<string> filtersFailed = [];
 }
 
 /**