Extract some needed max length constants

bubble-server/src/main/java/bubble/model/account/Account.java

@@ -108,7 +108,7 @@ public class Account extends IdentifiableBaseParentEntity implements TokenPrinci
 
     @ECSearchable(filter=true) @ECField(index=10)
     @HasValue(message="err.name.required")
-    @ECIndex(unique=true) @Column(nullable=false, updatable=false, length=100)
+    @ECIndex(unique=true) @Column(nullable=false, updatable=false, length=NAME_MAX_LENGTH)
     @Getter private String name;
     public Account setName (String n) { this.name = n == null ? null : n.toLowerCase(); return this; }
     public boolean hasName () { return !empty(name); }

bubble-server/src/main/java/bubble/model/bill/AccountPaymentMethod.java

@@ -83,7 +83,8 @@ public class AccountPaymentMethod extends IdentifiableBase implements HasAccount
 
     public static final String DEFAULT_MASKED_PAYMENT_INFO = "XXXX-".repeat(3)+"XXXX";
     @ECSearchable @ECField(index=50, type=EntityFieldType.opaque_string)
-    @Type(type=ENCRYPTED_STRING) @Column(updatable=false, columnDefinition="varchar("+(100+ENC_PAD)+") NOT NULL")
+    @Type(type=ENCRYPTED_STRING)
+    @Column(updatable=false, columnDefinition="varchar(" + (NAME_MAXLEN + ENC_PAD) + ") NOT NULL")
     @Getter @Setter private String maskedPaymentInfo = DEFAULT_MASKED_PAYMENT_INFO;
 
     @ECSearchable @ECField(index=60)

bubble-server/src/main/java/bubble/model/bill/Bill.java

@@ -30,6 +30,8 @@ import static org.cobbzilla.wizard.model.entityconfig.annotations.ECForeignKeySe
 })
 public class Bill extends IdentifiableBase implements HasAccountNoName {
 
+    public static final int PERIOD_FIELDS_MAX_LENGTH = 20;
+
     @ECSearchable(fkDepth=shallow) @ECField(index=10)
     @ECForeignKey(entity=Account.class)
     @Column(nullable=false, updatable=false, length=UUID_MAXLEN)
@@ -53,15 +55,15 @@ public class Bill extends IdentifiableBase implements HasAccountNoName {
     public boolean unpaid() { return !paid(); }
 
     @ECSearchable @ECField(index=50, type=EntityFieldType.opaque_string)
-    @Column(nullable=false, updatable=false, length=20)
+    @Column(nullable=false, updatable=false, length=PERIOD_FIELDS_MAX_LENGTH)
     @ECIndex @Getter @Setter private String periodLabel;
 
     @ECSearchable @ECField(index=60, type=EntityFieldType.opaque_string)
-    @Column(nullable=false, updatable=false, length=20)
+    @Column(nullable=false, updatable=false, length=PERIOD_FIELDS_MAX_LENGTH)
     @Getter @Setter private String periodStart;
 
     @ECSearchable @ECField(index=70, type=EntityFieldType.opaque_string)
-    @Column(nullable=false, updatable=false, length=20)
+    @Column(nullable=false, updatable=false, length=PERIOD_FIELDS_MAX_LENGTH)
     @Getter @Setter private String periodEnd;
 
     public int daysInPeriod () { return BillPeriod.daysInPeriod(periodStart, periodEnd); }

bubble-server/src/main/java/bubble/model/bill/BubblePlan.java

@@ -41,6 +41,7 @@ import static org.cobbzilla.util.reflect.ReflectionUtil.copy;
 @Entity @NoArgsConstructor @Accessors(chain=true)
 public class BubblePlan extends IdentifiableBaseParentEntity implements HasAccount, HasPriority {
 
+    public static final int PLAN_NAME_MAX_LENGTH = 200;
     public static final int MAX_CHARGENAME_LEN = 12;
 
     public static final String[] UPDATE_FIELDS = {
@@ -59,7 +60,7 @@ public class BubblePlan extends IdentifiableBaseParentEntity implements HasAccou
 
     @ECSearchable(filter=true) @ECField(index=10)
     @HasValue(message="err.name.required")
-    @ECIndex(unique=true) @Column(nullable=false, updatable=false, length=200)
+    @ECIndex(unique=true) @Column(nullable=false, updatable=false, length=PLAN_NAME_MAX_LENGTH)
     @Getter @Setter private String name;
 
     @ECSearchable @ECField(index=20)