chore: bump to 0.74.0 + changelog for the doctor/runs round

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>

CHANGELOG.md

@@ -6,6 +6,31 @@ lockstep.
 
 ## Unreleased
 
+### Added (0.74.0)
+
+- **Doctor findings deep-link to their page.** Summary tiles and
+  panel rows jump to where the finding is actioned: modules → store,
+  "approvals waiting for review" → approvals inbox, audit chain →
+  audit log (chevron affordance, tooltip + semantics button). The
+  host-services empty state gains a "view the configuration" button,
+  and the update banner's release-notes URL is a real link now.
+
+### Fixed (0.74.0)
+
+- **Runs page no longer contradicts the sidebar.** Load failures are
+  classified instead of all reading "hub not reachable": an older hub
+  without the ListInvocations RPC gets "this view needs a newer hub
+  version" with a doctor link, the detached-off refusal shows the
+  regular feature-off empty state, and unknown errors surface a
+  copyable detail box. "Not reachable" is reserved for genuine
+  connection failures.
+- **Audit page timer leak.** The live-stream reconnect timer is held
+  and cancelled on dispose.
+- **a11y suite flake killed at the root.** The pending-timer failures
+  came from the gRPC channel's 5-minute idle timer being armed when
+  the last stream closes; the suite now closes the channel and pumps
+  past the idle timeout (6 consecutive full runs green).
+
 ### Added
 
 - **Full-history audit export.** The audit page's actions menu gains