fix(scoreboards): tell the shared code where the plugin lives

[ChuckBuilds]

Every grid-snapped font was rendering a pixel narrow, on every device.

The shared sports code reads a plugin's config_schema.json to tell a default font size from one the user chose — a default gets snapped to the font's pixel grid, a choice is left alone. It located the schema by inspecting loaded modules, which cannot work under the real plugin loader:

# PluginLoader._namespace_plugin_modules
namespaced = f"_plg_{safe_id}_{mod_name}"
sys.modules[namespaced] = mod
del sys.modules[mod_name]        # the original name goes away

So the lookup returned nothing → every configured size looked user-chosen → the snap was skipped → 4x6-font.ttf drew at 6 instead of 7, which is 3px-wide glyphs instead of 4px.

On a 256×64 panel that made the betting odds, the team records and the date row hard to read.

Fix

Each SportsCore declares _PLUGIN_DIR from its own __file__, which the shared code prefers over guessing. Needs core ChuckBuilds/LEDMatrix#519.

The guard

scripts/test_plugin_dir_under_loader.py reproduces the loader's sequence exactly — import sports.py under its bare name, then rename it away — because that combination is what makes the class report __module__ == "sports" with no such entry in sys.modules.

Both halves matter, and my first draft of this guard got it wrong: it imported under the namespaced name, __module__ still resolved, and it passed against the broken code. The corrected version was verified to fail for all eight with the declarations removed, and pass with them restored.

How this shipped

Found by a user counting pixels on a photo of the panel — not by any gate here.

• Every test imported plugins directly, which leaves the bare module entry in place, so the lookup succeeded.
• The safety harness loads plugins its own way and never reproduced it.
• 176 byte-identical renders passed throughout.

That gap is what the new guard closes.

Verified on hardware

	live service
before	plugin_dir=None, 4x6-font.ttf@6 for all six football managers
after	plugin_dir resolves, odds=@7 detail=@7, all eight scoreboards

Patch bumps. No behaviour change beyond restoring the intended font sizes.

[coderabbitai]

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[codacy-production]

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