Release v1.4.0

[acatangiu]

All runtimes are targeted, major release as it upgrades Polkadot-SDK to stable2409-3.

• Update to SDK stable2409-1 #490
• Kusama Treasury: remove funding to the Kappa Sigma Mu Society and disable burn #507
• Lower Parachain and Data Deposits to Encourage Experimentation on Kusama #501
• Asset hubs - Add all assets in pool with native to XcmPaymentApi #523
• Bridges patch applied for stable2409 #519
• Fresh weights for stable2409 + fixes #522

[acatangiu]

Let's get this released in Jan 💪

[bkchr]

• CI: Add Ecosystem tests #521 would also be nice.

[pandres95]

• Add dynamic BurnParameters for Kusama Treasury #511

[seadanda]

• Fix auto-renew benchmarks #517

[kianenigma]

• While Adds migrations to restore currupted staking ledgers in Polkadot and Kusama #447 fixed the core staking bug that we had last year, one account is still in an inconsistent state. To fix it, we either need a force_unstake(Root), or better, a one-off migration to fix it in this release. Juan and Michalis from W3F support are in touch with the account owner, and will provide a writeup to justify this migration. If writeup is ready in time, we should add this migration as well to fully close the book for this unfortunate bug. force unstake the last remaining corrupt ledger #538
• Disallow sub identity tweaking with NonTransfer proxy #518 is a security PR.

[Juanma0x]

• While Adds migrations to restore currupted staking ledgers in Polkadot and Kusama #447 fixed the core staking bug that we had last year, one account is still in an inconsistent state. To fix it, we either need a force_unstake(Root), or better, a one-off migration to fix it in this release. Juan and Michalis from W3F support are in touch with the account owner, and will provide a writeup to justify this migration. If writeup is ready in time, we should add this migration as well to fully close the book for this unfortunate bug.

I shared the justification for the migration in the announcements about the fix for the corrupted ledgers:
Recover corrupted Staking ledgers in Polkadot and Kusama

Feel free to comment.

[franciscoaguirre]

It would be good to get this one in as well:

• Add PoolAssetsExchanger to asset hubs #539

It'll allow cross-chain transfers from parachain through parachain going through Asset Hub with only USDT, no DOT/KSM required.