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/coredata/tracker_pattern.go

@@ -634,75 +634,6 @@ WHERE
 	return nil
 }
 
-func (tps *TrackerPatterns) LoadAllByCookieBannerID(
-	ctx context.Context,
-	conn pg.Querier,
-	scope Scoper,
-	cookieBannerID gid.GID,
-	filter *TrackerPatternFilter,
-	trackerType *TrackerType,
-) error {
-	trackerTypeFragment := "TRUE"
-	if trackerType != nil {
-		trackerTypeFragment = "tracker_type = @tracker_type"
-	}
-
-	q := `
-SELECT
-	id,
-	organization_id,
-	cookie_banner_id,
-	cookie_category_id,
-	common_tracker_pattern_id,
-	third_party_id,
-	tracker_type,
-	pattern,
-	match_type,
-	display_name,
-	description,
-	excluded,
-	max_age_seconds,
-	source,
-	last_matched_at,
-	mapping_requested_at,
-	created_at,
-	updated_at
-FROM
-	tracker_patterns
-WHERE
-	%s
-	AND cookie_banner_id = @cookie_banner_id
-	AND %s
-	AND %s
-ORDER BY
-	created_at ASC, id ASC;
-`
-
-	q = fmt.Sprintf(q, scope.SQLFragment(), trackerTypeFragment, filter.SQLFragment())
-
-	args := pgx.StrictNamedArgs{"cookie_banner_id": cookieBannerID}
-	maps.Copy(args, scope.SQLArguments())
-	maps.Copy(args, filter.SQLArguments())
-
-	if trackerType != nil {
-		args["tracker_type"] = *trackerType
-	}
-
-	rows, err := conn.Query(ctx, q, args)
-	if err != nil {
-		return fmt.Errorf("cannot query tracker patterns: %w", err)
-	}
-
-	patterns, err := pgx.CollectRows(rows, pgx.RowToAddrOfStructByName[TrackerPattern])
-	if err != nil {
-		return fmt.Errorf("cannot collect tracker patterns: %w", err)
-	}
-
-	*tps = patterns
-
-	return nil
-}
-
 func (tps *TrackerPatterns) RefreshLastMatchedAtByCookieBannerID(
 	ctx context.Context,
 	tx pg.Tx,