drawings: on a rev mismatch, Clerical can keep the retired rev VISUAL calls (#41)

When VISUAL calls a rev that M-Files has retired, the draft is still
flagged rev_mismatch, but the drawing job now also copies the rev VISUAL
calls (MFilesKit 0.1.3 DrawingLookup.revision) into drawing_revisions and
visual.called. A Clerical Supervisor picks either rev on the packet:
"Use latest rev N" as before, or "Use rev V as VISUAL calls it"
(rev-approve with use=called), with a reason and a signature.

The kept rev holds while M-Files' Effective rev stays the one chosen
against: no flag, no change order. A newer Effective rev flags the
packet again; a new VISUAL rev clears the choice.

Migration 0009 adds drawing_revisions. Needs mfileskit 0.1.3.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

server/packetstation/migrations/0009_drawing_revisions.sql

@@ -0,0 +1,19 @@
+-- Other revs of a drawing that M-Files still holds (a Retired rev VISUAL calls), so Clerical can choose between
+-- the rev VISUAL calls and the Effective one. One row per drawing number and rev. asset_id is the fetched copy.
+CREATE TABLE drawing_revisions (
+    dwg          text NOT NULL,
+    rev          int NOT NULL,
+    checked_at   timestamptz NOT NULL,
+    controlled   text NOT NULL,
+    state        text,
+    name         text,
+    obj_id       int,
+    obj_version  int,
+    file_id      int,
+    file_version int,
+    file_size    bigint,
+    base         text,
+    asset_id     uuid REFERENCES assets (id),
+    sha256       bytea,
+    PRIMARY KEY (dwg, rev)
+);