Refacto load all functions

Unbounded LoadAll* loaders materialised an entire result set in one
query with no ceiling. A table that is small in development can grow
without bound in production, so these loaders were a latent memory
and query-time hazard.

Remove the LoadAll* methods from pkg/coredata and walk the cursor-
paginated LoadBy* siblings instead through a shared page.LoadAll
helper. The helper advances a MaxCursorSize forward cursor until the
result set is exhausted and concatenates the pages. It caps a single
call at MaxLoadAllPages (20) batches of 500 rows and errors past that
rather than materialising an unbounded set, so a runaway caller fails
loudly instead of exhausting memory.

Callers that genuinely need every row now express that explicitly,
and the coredata load-naming rule and docs are updated to discourage
new unbounded loaders.

Signed-off-by: Sacha Al Himdani <sacha@probo.com>

pkg/cookiebanner/reset_trackers_test.go

@@ -24,6 +24,7 @@ import (
 	"go.probo.inc/probo/internal/test"
 	"go.probo.inc/probo/pkg/coredata"
 	"go.probo.inc/probo/pkg/gid"
+	"go.probo.inc/probo/pkg/page"
 )
 
 // TestResetBannerTrackers_FullRebuild seeds a banner with an
@@ -113,8 +114,22 @@ func TestResetBannerTrackers_FullRebuild(t *testing.T) {
 			require.Nil(t, exact.ThirdPartyID)
 			require.NotNil(t, exact.MappingRequestedAt)
 
-			var detections coredata.DetectedTrackers
-			require.NoError(t, detections.LoadAllByTrackerPatternID(ctx, conn, fx.scope, exact.ID))
+			detections, err := page.LoadAll(
+				ctx,
+				page.OrderBy[coredata.DetectedTrackerOrderField]{
+					Field:     coredata.DetectedTrackerOrderFieldLastDetectedAt,
+					Direction: page.OrderDirectionAsc,
+				},
+				func(ctx context.Context, cursor *page.Cursor[coredata.DetectedTrackerOrderField]) ([]*coredata.DetectedTracker, error) {
+					var batch coredata.DetectedTrackers
+					if err := batch.LoadByTrackerPatternID(ctx, conn, fx.scope, exact.ID, cursor); err != nil {
+						return nil, err
+					}
+
+					return batch, nil
+				},
+			)
+			require.NoError(t, err)
 			require.Len(t, detections, 1)
 			require.Equal(t, identifier, detections[0].Identifier)
 		}