fix: evaluate if current day of week is valid correctly (#1763)

2 issues found
- our cron implementation did not evaluate if the current time matched
the day of the week properly
- discovered in this PR:
https://github.com/TBD54566975/ftl/pull/1733/files
- this revealed that the new shorthand day of the week logic was doing
the equivalent of `* * * * * x *` (every second of the chosen day)
rather than `0 0 0 * * x *` (midnight of the chosen day)

fyi, plan is to replace with an actual cron lib anyway...

internal/cron/cron.go

@@ -197,10 +197,10 @@ func isCurrentValueAllowedForDayOfWeekStep(step Step, values componentValues, t
 	}
 
 	results := slices.Map(days, func(day int) bool {
-		if values[t] < start || values[t] > end {
+		if value < start || value > end {
 			return false
 		}
-		if (values[t]-start)%incr != 0 {
+		if (value-start)%incr != 0 {
 			return false
 		}
 		return true

internal/cron/cron_test.go

@@ -148,22 +148,19 @@ func TestNext(t *testing.T) {
 				time.Date(2025, 6, 6, 0, 0, 0, 0, time.UTC),
 			},
 		}},
-		// TODO: These two are failing on the NextAfter with inclusive=true
-		/*
-			// Every wednesday
-			{"0 0 0 * * 3 *", [][]time.Time{
-				{ // 2024-06-09 is a Sunday
-					time.Date(2024, 6, 9, 0, 0, 0, 0, time.UTC),
-					time.Date(2024, 6, 12, 0, 0, 0, 0, time.UTC),
-				},
-			}},
-			{"Wednesday", [][]time.Time{
-				{ // 2024-06-09 is a Sunday
-					time.Date(2024, 6, 9, 0, 0, 0, 0, time.UTC),
-					time.Date(2024, 6, 12, 0, 0, 0, 0, time.UTC),
-				},
-			}},
-		*/
+		// Every wednesday
+		{"0 0 0 * * 3 *", [][]time.Time{
+			{ // 2024-06-09 is a Sunday
+				time.Date(2024, 6, 9, 0, 0, 0, 0, time.UTC),
+				time.Date(2024, 6, 12, 0, 0, 0, 0, time.UTC),
+			},
+		}},
+		{"Wed", [][]time.Time{
+			{ // 2024-06-09 is a Sunday
+				time.Date(2024, 6, 9, 0, 0, 0, 0, time.UTC),
+				time.Date(2024, 6, 12, 0, 0, 0, 0, time.UTC),
+			},
+		}},
 	} {
 		t.Run(fmt.Sprintf("CronSeries:%s", tt.str), func(t *testing.T) {
 			pattern, err := Parse(tt.str)

internal/cron/pattern.go

@@ -84,6 +84,9 @@ func (p Pattern) standardizedComponents() ([]Component, error) {
 		}
 
 		components := newComponentsFilled()
+		components[0] = newComponentWithValue(0) // seconds
+		components[1] = newComponentWithValue(0) // minutes
+		components[2] = newComponentWithValue(0) // hours
 		components[5] = newComponentWithValue(dayOfWeekInt)
 		return components, nil
 	}