Merge branch 'main' into claude/hdx-5302-mcp-promql

Author: karl-power

.changeset/alert-above-threshold-highlight.md

@@ -0,0 +1,7 @@
+---
+'@hyperdx/api': minor
+'@hyperdx/app': minor
+'@hyperdx/common-utils': minor
+---
+
+feat: add optional `titleEmoji` webhook option; `false` removes the emoji prefix from notification titles sent through that webhook

.changeset/alert-title-emoji-toggle.md

@@ -0,0 +1,12 @@
+---
+'@hyperdx/common-utils': patch
+'@hyperdx/app': patch
+'@hyperdx/api': patch
+---
+
+fix: refresh cached table columns after 5 minutes
+
+The shared metadata cache kept each table's `DESCRIBE` result for the life of
+the process, so the API did not see columns added with `ALTER TABLE`, such as
+new MATERIALIZED columns, until it restarted. Cached columns now expire after 5
+minutes. Other cached metadata is unchanged.

.changeset/backtick-column-split.md

@@ -0,0 +1,8 @@
+---
+'@hyperdx/api': patch
+'@hyperdx/common-utils': patch
+---
+
+fix: reject alerts on dashboard tiles the alert checker never evaluates (PromQL
+tiles, and builder tiles with unsupported display types), and drop them when a
+dashboard is saved