[Runtime] RT3800 Schedule

Development Runtime upgrades
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We are planning to release Runtime 3800 in All network(s) following the schedule below:
Alphanet: 2025-07-08T22:00:00Z
Moonriver: 2025-07-26T22:00:00Z
Moonbeam: 2025-08-09T22:00:00Z

This runtime upgrade includes several breaking changes.
See the release note for more details:

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Moonbeam Runtime 3800 — What it means for you

This release introduces several improvements, most notably:

:star: A new capped linear inflation model

:point_right: Max 60M GLMR/year (after supply reaches 1.2B)

Additional upgrades include:

:full_moon: New bridge support between Moonbeam, Moonriver & testnets

:full_moon: GMP + XCM V1 compatibility

:full_moon: Lazy migration cleanup

:full_moon: Updated runtime weights

No impact to gas or ABIs—just better infrastructure for devs.

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