chore(deps): update dependency element-hq/synapse to v1.150.0

[renovate]

This PR contains the following updates:

Package	Update	Change
element-hq/synapse	minor	v1.149.1 → v1.150.0

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Pre-merge checks for Synapse or MAS workloads

• The Release Notes do not describe any breaking changes.

• The Upgrade document does not describe any breaking changes.

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Release Notes

element-hq/synapse (element-hq/synapse)

v1.150.0

Compare Source

Synapse 1.150.0 (2026-03-24)

No significant changes since 1.150.0rc1.

Upgrade notes

Please read the upgrade notes as this release includes a few changes that may affect your deployment.

Synapse 1.150.0rc1 (2026-03-17)

Features

• Add experimental support for the MSC4370 Federation API GET /extremities endpoint. (#​19314)
• MSC4140: Cancellable delayed events: When persisting a delayed event to the timeline, include its delay_id in the event's unsigned section in /sync responses to the event sender. (#​19479)
• Expose MSC4354 Sticky Events over the legacy (v3) /sync API. (#​19487)
• When Matrix Authentication Service (MAS) integration is enabled, allow MAS to set the user locked status in Synapse. (#​19554)

Bugfixes

• Fix Build and push complement image CI job pointing to non-existent image. (#​19523)
• Fix a bug introduced in v1.26.0 that caused deactivated, erased users to not be removed from the user directory. (#​19542)

Improved Documentation

• In the Admin API documentation, always express path parameters as /<param> instead of as /$param. (#​19307)
• Update docs to clarify outbound_federation_restricted_to can also be used with the Secure Border Gateway (SBG). (#​19517)
• Unify Complement developer docs. (#​19518)

Internal Changes

• Put membership updates in a background resumable task when changing the avatar or the display name. (#​19311)
• Add in-repo Complement test to sanity check Synapse version matches git checkout (testing what we think we are). (#​19476)
• Migrate dev dependencies to PEP 735 dependency groups. (#​19490)
• Remove the optional systemd-python dependency and the systemd extra on the synapse package. (#​19491)
• Avoid re-computing the event ID when cloning events. (#​19527)
• Allow caching of the /versions and /auth_metadata public endpoints. (#​19530)
• Add a few labels to the number groupings in the Processed request logs. (#​19548)

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