✨ Add the file-level graph columns and tighten the svg ones

Split out of "🐛 Declare the shape attributes stored files carry",
which is now #11125 and carries only its `common/` half. This commit is
the graph's own side of that change, and it stays on this branch.

`app.graph.schema.contract` pins `svg_viewbox` to `DOUBLE[4]` and
`svg_transform` to `DOUBLE[6]`. The shape schema types both `:map` on
purpose, because legacy files hold them as plain maps rather than as
`::grc/rect` and `::gmt/matrix` records, and a tighter *schema* would
reject those files. A tighter *column* costs nothing, since
`app.graph.schema.values/coerce` reads either form.

`app.graph.schema.nodes` declares four file-level attributes as
projection `:extra` rather than in `ctf/schema:file`: `:options`,
`:backend`, `:comment-thread-seqn`, and `:ignore-sync-until`. Declaring
them in the file schema breaks saving, measured at 185 failures, because
`app.binfile.common/update-file!` derives its UPDATE column list from a
file map's keys and the `file` table has no `backend` column, that value
being synthesized on read. An `:extra` is local to the graph and cannot
reach a write.

`app.graph.project.document` lifts `:options` out of `:data` before the
blob is dropped, so a consumer reads file-level configuration without
opening the blob.

AI-assisted-by: mixed models

backend/src/app/graph/project/document.clj

@@ -29,9 +29,14 @@
   uuid/zero)
 
 (defn- document-attrs
+  "The Document node's attrs: the file row, minus its data blob.
+
+  `:options` is lifted out of the blob before it goes: it is file-level
+  configuration a consumer wants without opening `:data`."
   [file data]
   (-> file
       (assoc :id (or (:id data) (:id file)))
+      (cond-> (:options data) (assoc :options (:options data)))
       (dissoc :data)))
 
 (defn- page-attrs

backend/src/app/graph/schema/contract.clj

@@ -107,7 +107,14 @@
    ;; derivable from `x`/`y`/`width`/`height`, and a fixed-size array is a
    ;; tensor row a consumer reads without parsing.
    "selrect"     "DOUBLE[4]"
-   "svg_viewbox" "DOUBLE[4]"
+
+   ;; The SVG provenance attributes are typed `:map` in the shape schema on
+   ;; purpose — legacy files hold them as plain maps rather than as `::grc/rect`
+   ;; and `::gmt/matrix` records, and a tighter *schema* would reject those files
+   ;; (`app.common.types.shape/schema:shape-generic-attrs`). A tighter *column*
+   ;; is free: `app.graph.schema.values/coerce` reads either form.
+   "svg_viewbox"   "DOUBLE[4]"
+   "svg_transform" "DOUBLE[6]"
 
    ;; `:fills` is an `:or` — the packed `app.common.types.fills` value or a
    ;; plain vector of fill maps — so the schema alone cannot say it is a

backend/src/app/graph/schema/nodes.clj

@@ -18,6 +18,7 @@
   (:require
    [app.common.exceptions :as ex]
    [app.common.schema :as sm]
+   [app.common.time :as ct]
    [app.common.types.component :as ctk]
    [app.common.types.file :as ctf]
    [app.common.types.page :as ctp]
@@ -33,7 +34,24 @@
 ;; beadpot/graph/schemas.py drop_fields
 (def ^:private document-projection
   {:source ctf/schema:file
-   :drop   [:data]})
+   :drop   [:data]
+   ;; Attributes a file map carries that `ctf/schema:file` does not declare.
+   ;;
+   ;; They belong here rather than in that schema, even though the graph wants
+   ;; them, because `schema:file` is on the *write* path too:
+   ;; `app.binfile.common/update-file!` derives its UPDATE columns from a file
+   ;; map's keys, so declaring `:backend` there made it try to write a `backend`
+   ;; column, which the `file` table does not have — it is synthesized on read.
+   ;; A projection `:extra` is local to the graph and cannot reach a write.
+   ;;
+   ;; `:options` is lifted out of `:data` before the blob is dropped
+   ;; (`app.graph.project.document/document-attrs`); the rest come off the file
+   ;; map as `get-file` returns it.
+   :extra  [:map
+            [:options {:optional true} [:maybe :map]]
+            [:backend {:optional true} [:maybe :string]]
+            [:comment-thread-seqn {:optional true} [:maybe :int]]
+            [:ignore-sync-until {:optional true} [:maybe ::ct/inst]]]})
 
 (def ^:private page-projection
   {:source ctp/schema:page