• [CHANGE] notify: The reason label on alertmanager_notifications_failed_total now distinguishes authError (HTTP 401/403) and rateLimited (HTTP 429) from the generic clientError. Dashboards/alerts matching reason="clientError" for these codes must be updated. #5332
• [FEATURE] Add optional templatable labels to alert routes. #5328
• [FEATURE] eventrecorder: Add inhibit rule names to inhibition_muted_alert events. #5315
• [FEATURE] eventrecorder: Add stdout output type. #5311
• [FEATURE] silences: Add active, expired, and pending boolean filter parameters to GET /api/v2/silences to allow filtering silences by state server-side. #5406
• [FEATURE] sns: Add aws external_id support in sigv4 configuration. #5157
• [FEATURE] template: Add toDate and mustToDate functions. #5327
• [ENHANCEMENT] doc: Add AlertmanagerClusterFailedPeers alertmanager-mixin. #5301
• [ENHANCEMENT] doc: Add description for Rocketchat parameters in global config. #5181
• [ENHANCEMENT] doc: Add top level tracing configuration key. #5314
• [ENHANCEMENT] doc: Fix Alertmanager port in amtool config routes example. #5312
• [ENHANCEMENT] eventrecorder: Add optional webhook batching. #5392
• [ENHANCEMENT] notify: The discord and webex integrations now report a failure reason on alertmanager_notifications_failed_total. #5332
• [ENHANCEMENT] ui: Improve responsiveness of UI when loading thousands of alerts. #5357
• [BUGFIX] eventrecorder: Fixed a minor performance regression when the event recorder is enabled. #5307
• [BUGFIX] msteamsv2: Inherit global proxy_url into partial http_config. #5379
• [BUGFIX] webhook: Keep custom payload string values verbatim instead of reinterpreting JSON leaves that look like YAML (e.g. values ending with a colon). #5304