fix(ban-all): expand urgent queue capacity

[lorenzocorallo]

Summary

• raise the BanAll outstanding-job cap from 30,000 to 60,000
• raise the executor rate from 8 to 12 jobs per second so accepted work does not create a two-hour tail
• update regression coverage and retention calculations for the new bounds

Production evidence

At the time of the incident:

• 29,754 outstanding executor jobs used 44.16 MiB of Redis memory
• Redis had a 320 MiB memory limit and peaked at 46.79 MiB
• the 1 GiB PVC had 843 MiB free
• AOF writes were healthy, with no rejected connections or evictions
• 46 BanAll parents were waiting and the executor drained exactly 8 jobs per second

At the new cap, current observed memory density projects well below both the Redis memory limit and the container limit. The 12-per-second rate limits worst-case BanAll Telegram traffic to 24 calls per second when every job also needs explicit deletion.

Operational effect

• supports about 92 simultaneous 648-chat flows
• reduces the first-attempt drain time of a full 60,000-job queue to about 83 minutes
• preserves the admission bound and all retry, retention, and permanent-error behavior

Verification

• pnpm test (79 tests)
• pnpm typecheck
• pnpm check
• pnpm build

[coderabbitai]

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📥 Commits

Reviewing files that changed from the base of the PR and between d1283b5 and 87cb028.

📒 Files selected for processing (2)

• src/modules/moderation/ban-all-flow.ts
• tests/ban-all-flow.test.ts

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