pin pgmq

[nhudson]

Apparently we need to pin the version of the pgmq crate to 0.29.2 exactly even though we have the version set, it somehow still will use 0.29.4 during the build process.

Using the latest version causes an error in Conductor:

[2025-01-02T23:10:07Z DEBUG sqlx::query] summary="SELECT * from pgmq.read(queue_name=>$1::text, …" db.statement="\n\nSELECT\n  *\nfrom\n  pgmq.read(\n    queue_name = > $1 :: text,\n    vt = > $2 :: integer,\n    qty = > $3 :: integer\n  )\n" rows_affected=0 rows_returned=1 elapsed=6.350657ms elapsed_secs=0.006350657
[2025-01-02T23:10:07Z ERROR conductor] error in conductor: PgmqError(DatabaseError(ColumnIndexOutOfBounds { index: 5, len: 5 }))