feat: migrate from npm to bun and fix analytics map height

Switch package manager and runtime from Node.js/npm to Bun across
Docker, CI, and scripts. The SQLite driver remains better-sqlite3
due to Next.js Turbopack being unable to resolve bun:sqlite during
build-time page pre-rendering.

Also fix the world map not rendering in the analytics page — the
overflowX wrapper added for mobile broke the flex height chain,
collapsing the map to 0px.

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

app/(dashboard)/analytics/AnalyticsClient.tsx

@@ -509,10 +509,8 @@ export default function AnalyticsClient() {
                   <Typography variant="subtitle1" fontWeight={600} sx={{ mb: 1 }}>
                     Traffic by Country
                   </Typography>
-                  <Box sx={{ flex: 1, minHeight: 0 }}>
-                    <Box sx={{ overflowX: "auto", width: "100%" }}>
-                      <WorldMap data={countries} selectedCountry={selectedCountry} />
-                    </Box>
+                  <Box sx={{ flex: 1, minHeight: 280 }}>
+                    <WorldMap data={countries} selectedCountry={selectedCountry} />
                   </Box>
                 </CardContent>
               </Card>