AddScopeOverlapFields, AddTaskDependency and AddFailureReason were each
generated off the same parent migration, so none of their Designer
snapshots knows the others' columns. AddTaskDependency calls AddForeignKey,
which on SQLite forces a full `tasks` table rebuild generated from that
migration's own frozen snapshot -- silently recreating the table without
`scope_globs`.
Result: the Worker died at startup with "no such column: t.scope_globs"
(Hosting failed to start), so it never bound the SignalR port and the App
could not connect. Fresh installs were affected too, not just existing DBs.
Add the missing ScopeGlobs property to the stale Designer snapshot so the
rebuild preserves the column. Verified by migrating a fresh temp DB and
diffing pragma_table_info('tasks') against the model snapshot: 39/39
columns.
Note: the test suite cannot catch this class of bug -- every fixture uses
Database.EnsureCreated(), which builds the schema from the model and never
applies the migration chain.
Adds a user/MCP-declared task dependency (DependsOnTaskId) distinct from the
planning chain's internal BlockedByTaskId: add_task/update_task can set it,
the queue picker skips a Queued task until the dependency reaches Done, a
Failed/Cancelled dependency leaves the dependent blocked instead of starving
silently, and setting a link rejects self-reference/unknown-id/cycles.
get_task/list_tasks/batch_get_tasks now report blocked/blockedReason, and
wait_for_task_change reports "Blocked" immediately instead of running out its
timeout on a task the picker will never claim.
preview_merge/preview_merge_set gain staleFiles: files a branch touches that
the target branch also changed since the branch's fork point, a more honest
staleness signal than `behind` alone.
mika kuns