Cards are moved to Review too quickly

[geomags3]

Hi,

Thanks so much for the great algorithm and implementation—it's really cool!

I’d like to use it in my app, but I’ve noticed an issue. It moves new cards to "Review" and increases the Due time too quickly. When I compared it to my Anki app with the same settings, the results were quite different:

Anki app:

1. Added a new card
2. Again (<1m), Hard (<6m), Good (<10m), Easy ( 7d) -> Again
3. Again (<1m), Hard (<6m), Good (<10m), Easy ( 2d) -> Hard
4. Again (<1m), Hard (<6m), Good (<10m), Easy ( 2d) -> Good
5. Again (<1m), Hard (<10m), Good (<1d), Easy ( 2d) -> Hard
6. Again (<1m), Hard (<10m), Good (<1d), Easy ( 2d) -> Easy
7. Moved to Review

py-fsrs script

test_w = (
    0.5614,
    1.2546,
    3.5878,
    7.9731,
    5.1043,
    1.1303,
    0.8230,
    0.0465,
    1.6290,
    0.1350,
    1.0045,
    2.1320,
    0.0839,
    0.3204,
    1.3547,
    0.2190,
    2.7849,
    0.4891,  # not used in the Anki app
    0.6468,  # not used in the Anki app
)

f = FSRS(w=test_w)
card = Card()
now = datetime.now(timezone.utc)

ratings = (
    Rating.Again,
    Rating.Hard,
    Rating.Good,
    Rating.Hard,
    Rating.Easy,
)

for rating in ratings:
    card, _ = f.review_card(card, rating, now)
    print(f"Rating: `{Rating(rating).name}` -> State: `{State(card.state).name}`,\t+{card.due - now}  Due: {card.due}, Difficulty: {card.difficulty}, Reps: {card.reps}, Lapses: {card.lapses}")

Rating: `Again` -> State: `Learning`,	+0:01:00  Due: 2024-09-20 19:09:43.358569+00:00, Difficulty: 5.1043, Reps: 1, Lapses: 0
Rating: `Hard` -> State: `Learning`,	+0:10:00  Due: 2024-09-20 19:18:43.358569+00:00, Difficulty: 5.698180550000001, Reps: 2, Lapses: 0
Rating: `Good` -> State: `Review`,	+1 day, 0:00:00  Due: 2024-09-21 19:08:43.358569+00:00, Difficulty: 5.479715154425001, Reps: 3, Lapses: 0
Rating: `Hard` -> State: `Review`,	+1 day, 0:00:00  Due: 2024-09-21 19:08:43.358569+00:00, Difficulty: 6.056138899744239, Reps: 4, Lapses: 0
Rating: `Easy` -> State: `Review`,	+3 days, 0:00:00  Due: 2024-09-23 19:08:43.358569+00:00, Difficulty: 5.036297940906132, Reps: 5, Lapses: 0