Decide whether canonical schema should carry team logos and goal-scorer events

[paulyhedral]

The bundesliga-reference-plugin change (FullTime-Plugin-Bundesliga) ran a side-by-side
live-network validation of this plugin's output against openligadb's direct client output,
both mapped through the canonical schema
(openspec/changes/bundesliga-reference-plugin/design.md, "Fields openligadb Provides
That the Canonical Schema Doesn't Carry"). Every canonical field matched; the following
upstream fields have no canonical-schema home and are dropped:

• Team/TableTeam::icon_url (team logo URL)
• Team::group (upstream team grouping label, distinct from match/round grouping)
• League::sport
• Match's league-identifying fields (league_id, league_name, league_season,
  league_shortcut, time_zone) — redundant for a single-league plugin, but would matter
  for a multi-league consumer
• Match::last_update
• Match::results's non-final entries (halftime, etc.)
• Match::goals (individual goal events: scorer, minute, penalty/own-goal flags)
• Location::city

None of these block the Bundesliga reference plugin — every field the canonical schema
currently defines is fully populated and verified. This issue is to decide whether any of
these should be added to the canonical league-data-schema, most plausibly team logos and
goal-scorer events for UI needs. No urgency; closing without action (schema stays as-is) is
a valid outcome.