HNS+UI: 4 nova endpointa + multi-sport schema (M2M kategorije + player_stats)

Endpoints:
- GET /api/v2/enrich-sources — sport→source mapping
- GET /api/v2/klubovi/priority-sort — financirani/godišnjak prvi
- GET /api/v2/clan/{id}/kategorije — many-to-many kategorije
- GET /api/v2/clan/{id}/full — kompletna slika (profil+kategorije+sezone+utakmice+stats)
- POST /api/v2/export/klubovi — XLSX export selektiranih

Schema:
- pgz_sport.clan_kategorije (M2M: igrač u juniorskoj+seniorskoj)
- pgz_sport.player_stats (multi-sport: nogomet/košarka/rukomet/odbojka/vaterpolo)
- pgz_sport.klub_roster (multi-source)
- pgz_sport.enrichment_sources (sport→izvor)
- View: v_pgz_priority_klubovi (financiran || u_godisnjaku)
- View: v_klubovi_priority_sort (priority sort)

Sport harvesters scaffold:
- scripts/sport_harvesters/__base.py (SportHarvester class)
- hks_basketball.py, hrs_handball.py, hos_volleyball.py, hvs_waterpolo.py

scripts/sport_harvesters/hvs_waterpolo.py

@@ -0,0 +1,54 @@
+#!/usr/bin/env python3
+"""HVS waterpolo harvester."""
+import sys, re
+sys.path.insert(0, '/opt/pgz-sport/scripts/sport_harvesters')
+from __base import SportHarvester
+
+class HVSHarvester(SportHarvester):
+    SPORT = 'vaterpolo'
+    SOURCE = 'hvs'
+    
+    def scrape_klub(self, page, klub):
+        self.log(f"  🤽 Klub {klub['id']} {klub['naziv']}")
+        try:
+            # Get all klubovi list from HVS
+            page.goto("https://hvs.hr/klubovi/", wait_until="domcontentloaded", timeout=20000)
+            klub_links = page.locator('a[href*="/klub/"]').all()
+            naziv_lower = klub['naziv'].lower()
+            for a in klub_links[:30]:
+                text = a.inner_text().lower()
+                href = a.get_attribute('href') or ''
+                # Naivni match: ima li klub naziv u text-u
+                if any(kw in text for kw in naziv_lower.split() if len(kw) > 3):
+                    self.log(f"    Match: {text[:50]} → {href}")
+                    m = re.search(r'/klub/(\d+)', href)
+                    if m:
+                        kid = m.group(1)
+                        new_url = f"https://hvs.hr/klub/{kid}/"
+                        with self.conn.cursor() as cur:
+                            cur.execute("UPDATE pgz_sport.klubovi SET source_url = COALESCE(NULLIF(source_url,''), %s) WHERE id = %s", (new_url, klub['id']))
+                        # Now visit klub page for roster
+                        page.goto(new_url, wait_until="domcontentloaded", timeout=15000)
+                        igrac_links = page.locator('a[href*="/igrac/"]').all()
+                        self.log(f"    {len(igrac_links)} igrača found")
+                        for ia in igrac_links[:30]:
+                            ihref = ia.get_attribute('href') or ''
+                            naziv = ia.inner_text().strip()
+                            mi = re.search(r'/igrac/(\d+)', ihref)
+                            if mi and naziv:
+                                parts = re.split(r'\s+', naziv, 1)
+                                ime = parts[0]
+                                prezime = parts[1] if len(parts) > 1 else ''
+                                full_url = ihref if ihref.startswith('http') else f"https://hvs.hr{ihref}"
+                                clan_id = self.upsert_clan(
+                                    klub_id=klub['id'], source_id=mi.group(1),
+                                    ime=ime, prezime=prezime,
+                                    source_url=full_url
+                                )
+                                self.stats['players'] += 1
+                        break
+        except Exception as e:
+            self.log(f"    ❌ {e}")
+
+if __name__ == '__main__':
+    HVSHarvester().run(limit=int(sys.argv[1]) if len(sys.argv) > 1 else 50)