fix(metadata): allow long summaries in output

[lengau]

Fixes #1758

More context in #1568

[mr-cal]

I had forgotten charmcraft is grandfathered into unlimited-length summaries. Do you plan to deprecate that in a future major release? Or leave it as-is?

[lengau]

@mr-cal on input we limit the summary string to 200 characters (

charmcraft/charmcraft/models/project.py

Lines 70 to 79 in 2d1e6d3

	class CharmcraftSummaryStr(models.SummaryStr):
	"""A brief summary of this charm or bundle. Ideally, this should fit into one line."""
	# Maximum length was set to 200 characters because the 78 character maximum
	# inherited from craft-application is too restrictive, as several hundred charms
	# already exceed this maximum.
	# Eventually this limit will be reduced, ideally to 78 characters, though that may
	# never happen entirely. Reductions will only occur on major releases.
	# https://github.com/canonical/charmcraft/issues/1598
	max_length = 200

), but since this is the output I'm not particularly concerned about checking it (and having another potential failure point) there.

There's no current plan to reduce it further, as charmhub has quite a few that are longer.

[mr-cal]

@mr-cal on input we limit the summary string to 200 characters (

charmcraft/charmcraft/models/project.py

Lines 70 to 79 in 2d1e6d3

	class CharmcraftSummaryStr(models.SummaryStr):
	"""A brief summary of this charm or bundle. Ideally, this should fit into one line."""
	# Maximum length was set to 200 characters because the 78 character maximum
	# inherited from craft-application is too restrictive, as several hundred charms
	# already exceed this maximum.
	# Eventually this limit will be reduced, ideally to 78 characters, though that may
	# never happen entirely. Reductions will only occur on major releases.
	# https://github.com/canonical/charmcraft/issues/1598
	max_length = 200

), but since this is the output I'm not particularly concerned about checking it (and having another potential failure point) there.

There's no current plan to reduce it further, as charmhub has quite a few that are longer.

Ah, it's 200. Leaving it as-is is fine with me!