fix(geoportal): mount Martin config + upgrade v1.4 + enable building labels

Root cause: martin.yaml was never mounted in docker-compose.yml — Martin ran
in auto-discovery mode which dropped cadastral_ref from gis_cladiri tiles.

Changes:
- docker-compose: mount martin.yaml, upgrade Martin v0.15→v1.4.0, use --config
- map-viewer: add cladiriLabel layer (cadastral_ref at z16+), wire into visibility
- martin.yaml: update version comment
- geoportal/: tile server evaluation doc + 3 skill files (vector tiles, PMTiles, MapLibre perf)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/modules/geoportal/components/map-viewer.tsx

@@ -58,6 +58,7 @@ const LAYER_IDS = {
   terenuriLabel: "l-terenuri-label",
   cladiriFill: "l-cladiri-fill",
   cladiriLine: "l-cladiri-line",
+  cladiriLabel: "l-cladiri-label",
   selectionFill: "l-selection-fill",
   selectionLine: "l-selection-line",
   drawPolygonFill: "l-draw-polygon-fill",
@@ -320,7 +321,7 @@ export const MapViewer = forwardRef<MapViewerHandle, MapViewerProps>(
         ],
         administrativ: [LAYER_IDS.adminLineOuter, LAYER_IDS.adminLineInner],
         terenuri: [LAYER_IDS.terenuriFill, LAYER_IDS.terenuriLine, LAYER_IDS.terenuriLabel],
-        cladiri: [LAYER_IDS.cladiriFill, LAYER_IDS.cladiriLine],
+        cladiri: [LAYER_IDS.cladiriFill, LAYER_IDS.cladiriLine, LAYER_IDS.cladiriLabel],
       };
       for (const [group, layerIds] of Object.entries(mapping)) {
         const visible = vis[group] !== false;
@@ -438,9 +439,15 @@ export const MapViewer = forwardRef<MapViewerHandle, MapViewerProps>(
           paint: { "fill-color": "#3b82f6", "fill-opacity": 0.5 } });
         map.addLayer({ id: LAYER_IDS.cladiriLine, type: "line", source: SOURCES.cladiri, "source-layer": SOURCES.cladiri, minzoom: 14,
           paint: { "line-color": "#1e3a5f", "line-width": 0.6 } });
-        // TODO: Building body labels (C1, C2...) — disabled pending Martin tile investigation
-        // Martin MVT tiles don't include cadastral_ref as a property despite the view exposing it.
-        // Next step: evaluate alternatives (pg_tileserv, GeoJSON source, Martin config).
+        // Building cadastral_ref labels (e.g. C1, C2...)
+        map.addLayer({ id: LAYER_IDS.cladiriLabel, type: "symbol", source: SOURCES.cladiri, "source-layer": SOURCES.cladiri, minzoom: 16,
+          layout: {
+            "text-field": ["coalesce", ["get", "cadastral_ref"], ""],
+            "text-font": ["Noto Sans Regular"],
+            "text-size": 9, "text-anchor": "center", "text-allow-overlap": false,
+            "text-max-width": 6,
+          },
+          paint: { "text-color": "#1e3a5f", "text-halo-color": "#fff", "text-halo-width": 1 } });
 
         // === Selection highlight ===
         map.addLayer({ id: LAYER_IDS.selectionFill, type: "fill", source: SOURCES.terenuri, "source-layer": SOURCES.terenuri, minzoom: 13,