Merge #6219: M11: PDF/A verify reports pages with transparency but no blending colour space, and blend modes ISO 32000-1 doesn't define (optimize.pdfa-validate)

# Conflicts:
#	crates/preflight/src/lib.rs
#	crates/preflight/src/tests.rs
#	parity/acrobat-features.toml

parity/acrobat-features.toml

@@ -8018,7 +8018,7 @@ status = "partial"
 commands = ["standards.pdfa"]
 tools = ["pdfa_verify"]
 evidence = ["crates/preflight/src/tests.rs::verify_reports_what_breaks_pdfa", "crates/preflight/src/tests.rs::standards_identification_uses_namespace_not_prefix", "crates/preflight/src/tests.rs::convert_fixes_all_but_fonts", "crates/preflight/src/tests.rs::verify_reports_an_output_intent_that_does_not_match_device_colour", "crates/preflight/src/tests.rs::xmp_simple_values_have_their_lexical_forms", "crates/preflight/src/tests.rs::xmp_arrays_have_their_kind_and_item_types", "crates/preflight/src/tests.rs::xmp_structures_have_their_field_types", "crates/preflight/src/tests.rs::xmp_value_types_are_reported_by_verify", "crates/preflight/src/tests.rs::xmp_exif_schemas_have_their_value_types", "crates/preflight/src/tests.rs::xmp_exif_properties_are_known_by_namespace_uri", "crates/preflight/src/tests.rs::xmp_extension_schema_descriptions_are_complete", "crates/preflight/src/tests.rs::xmp_extension_findings_say_where_they_are", "crates/preflight/src/tests.rs::xmp_extension_naming_entries_are_not_empty", "crates/preflight/src/tests.rs::xmp_mistyped_properties_name_their_type", "crates/preflight/src/tests.rs::xmp_properties_are_known_by_namespace_uri_and_named_as_written", "crates/automation/tests/it/automation.rs::pdfa_through_tools", "crates/ui-egui/tests/it/compare.rs::pdfa_dialog_verifies_and_converts", "crates/preflight/src/tests.rs::implementation_limits_are_reported", "crates/preflight/src/tests.rs::implementation_limits_reach_the_trailer_split_content_deep_values_and_huge_boxes", "crates/preflight/src/tests.rs::implementation_limits_cover_reals_and_cids", "crates/preflight/src/tests.rs::separation_and_devicen_spaces_are_checked", "crates/preflight/src/tests.rs::separation_and_devicen_checks_follow_references_depth_and_nchannel", "crates/preflight/src/tests.rs::file_header_is_checked_and_rewritten", "crates/preflight/src/tests.rs::extended_graphics_states_are_checked", "crates/preflight/src/tests.rs::graphics_state_scan_reads_each_object_once_whatever_the_generation", "crates/preflight/src/tests.rs::trailer_file_identifier_is_checked_and_added", "crates/preflight/src/tests.rs::set_state_no_op_and_named_actions_are_checked"]
-notes = "PDF/A-2b/3b structural rules: the file header (6.1.2), identification, the trailer file identifier (6.1.3), the value types of the predefined XMP schemas (6.6.2.3.1: dc, xmp, xmpRights, xmpMM, xmpBJ, xmpTPg, xmpDM, pdf, photoshop, crs, and tiff, exif and aux from the September 2005 XMP Specification, with their structures), XMP extension schema descriptions (6.6.2.3.3, after PDF Association TechNote 0009 section 4: required entries of the schema, property, value type and field descriptions, none of the naming entries empty, and the five required prefixes; that a property's custom value type has its own pdfaSchema:valueType description is not yet checked), encryption, output intent (present, and RGB/CMYK to match DeviceRGB/DeviceCMYK use), fonts embedded, graphics states (6.2.5: TR, TR2, HTP, halftone types, names and transfer functions with the primary components of ISO 32000-1 10.5.5.6, rendering intents), annotations, actions (with SetState, NOP and Named actions other than the four page moves), images, embedded files, the implementation limits of 6.1.13 (integers, reals, strings, names, CIDs and page boundaries, ISO 32000-1 Annex C), and Separation and DeviceN spaces (6.2.4.4: one definition per colorant name, spot colorants in /Colorants; a device alternate without a matching output intent is not yet reported). Not yet: content-stream operator checks, transparency details, PDF/A-1 and -4, a veraPDF comparison."
+notes = "PDF/A-2b/3b structural rules: the file header (6.1.2), identification, the trailer file identifier (6.1.3), the value types of the predefined XMP schemas (6.6.2.3.1: dc, xmp, xmpRights, xmpMM, xmpBJ, xmpTPg, xmpDM, pdf, photoshop, crs, and tiff, exif and aux from the September 2005 XMP Specification, with their structures), XMP extension schema descriptions (6.6.2.3.3, after PDF Association TechNote 0009 section 4: required entries of the schema, property, value type and field descriptions, none of the naming entries empty, and the five required prefixes; that a property's custom value type has its own pdfaSchema:valueType description is not yet checked), encryption, output intent (present, and RGB/CMYK to match DeviceRGB/DeviceCMYK use), fonts embedded, graphics states (6.2.5: TR, TR2, HTP, halftone types, names and transfer functions with the primary components of ISO 32000-1 10.5.5.6, rendering intents), annotations, actions (with SetState, NOP and Named actions other than the four page moves), images, embedded files, the implementation limits of 6.1.13 (integers, reals, strings, names, CIDs and page boundaries, ISO 32000-1 Annex C), Separation and DeviceN spaces (6.2.4.4: one definition per colorant name, spot colorants in /Colorants; a device alternate without a matching output intent is not yet reported), and transparency (6.2.10: blend modes ISO 32000-1 defines, and a blending colour space on pages with transparency when there is no PDF/A output intent). Not yet: content-stream operator checks, a transparency group blending colour space checked against the output intent, PDF/A-1 and -4, a veraPDF comparison."
 
 [[feature]]
 id = "optimize.pdfa-convert"