feat: build retrieval tasks from storage deals

[bajtos]

Links:

• SPARK CID sampling alpha space-meridian/roadmap#43

[bajtos]

The outcome of running the scripts for 10k recent deals:

parse-ldn-deals

❯ node scripts/parse-ldn-deals.js
Finished after 0.1 seconds

Total deals:    10594n
LDN with Label: 7312n
Ratio:          69%

LDN deals were written to generated/ldn-deals.ndjson

build-retrieval-tasks

❯ node scripts/build-retrieval-tasks.js
((omitted a bunch of MaxListenersExceededWarning about too many abort listeners added to [AbortSignal]))
Finished in 1134.23 seconds

Total CIDs:    7312n
 - advertised: 3151n (43%)

Total tasks:   9905n
 - http        141n (1%)
 - bitswap     1696n (17%)
 - graphsync   8068n (81%)

Retrieval tasks were written to generated/retrieval-tasks.ndjson