add: ephemeral dust chart

[0xB10C]

part of #101

[0xB10C]

cc @tankyleo

[0xB10C]

I also re-ran the following query to see when a pool first mined ephemeral dust:

SELECT
    t.pool_id,
    MIN(CASE WHEN t.tx_spending_ephemeral_dust > 0 THEN t.height END) AS first_ephemeral_dust_height,
    MIN(CASE WHEN t.tx_spending_ephemeral_dust > 0 THEN t.date END) AS first_ephemeral_dust_date
FROM (
    SELECT
        bs.date,
        bs.height,
        ts.tx_spending_ephemeral_dust,
        bs.pool_id
    FROM tx_stats ts
    JOIN block_stats bs ON ts.height = bs.height
    WHERE ts.tx_spending_ephemeral_dust > 0
) t
GROUP BY t.pool_id
ORDER BY first_ephemeral_dust_date;

Which yields:

pool	first_ephemeral_dust_height	first_ephemeral_dust_date
MaraPool	894455	2025-04-29
Antpool	900676	2025-06-10
F2Pool	901146	2025-06-14
SpiderPool	913602	2025-09-07
Ocean	925458	2025-11-27
Innopolis Tech	927765	2025-12-13

Innopolis Tech at height 927765 on 2025-12-13 seems to be the new.

[0xB10C]

While we haven't done this yet, I think it could be possible to have the above SQL query as a mainnet-observer export and instead of showing a chart, show a table?

[0xB10C]

While we haven't done this yet, I think it could be possible to have the above SQL query as a mainnet-observer export and instead of showing a chart, show a table?

Did that!

[tankyleo]

Thank you @0xB10C I particularly like the table with the mining pool attributions !

[0xB10C]

Should do the same for P2A? What do you think?

[tankyleo]

Should do the same for P2A? What do you think?

Sounds good to me !