feat(categorize): close rule gaps found on scheduled posts

The first pass only covered published posts, so 137 scheduled ones were
still uncategorised. Seven of them matched no rule at all and exposed
real gaps: the regions Pfalz and Erzgebirge, and the gear nouns in
"Duschzelte", "Outdoor-Messer" and "Outdoor-Stuhl", which the existing
compound keywords could not reach because the noun sits at the end.

Adding those flipped two discount posts ("Lidl Zelt im Angebot", "Aldi
Relax-Stuhl") into the gear category, because the new product keywords
outweighed the weaker "lidl"/"aldi" signals. Both retailers only ever
appear in discount posts here, so they now carry enough weight to
trigger the offer override themselves.

Region keywords are weight 2, not 3: at 3 they outranked an explicit
"Campingplatz" in the title and pulled campsite articles into
"Reiseziele". Bare "pfalz" is weight 1 because it double-counts inside
"rheinland-pfalz".

Scheduled posts now match a rule 136 of 137 times. Ten published posts
change category as a result and were updated in WordPress to keep the
archive and the rules in sync.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

backend/app/categorize.py

@@ -40,8 +40,11 @@ _RULES: tuple[tuple[str, tuple[tuple[str, int], ...]], ...] = (
         ("rabatt*", 3), ("schnaeppchen*", 3), ("prime day", 3), ("black friday", 3),
         ("gutschein*", 3), ("sparangebot*", 3), ("top-angebot*", 3), ("sommerangebot*", 3),
         ("knaller", 3), ("ausverkauf", 3), ("tiefpreis*", 3), ("rekordpreis*", 3),
-        ("preissturz", 3), ("bestpreis*", 3), ("deal", 2), ("deals", 2), ("lidl", 2),
+        ("preissturz", 3), ("bestpreis*", 3), ("deal", 2), ("deals", 2),
-        ("aldi", 2), ("reduziert", 2), ("sale", 1), ("prozent auf", 3), ("guenstiger*", 1),
+        # Lidl and Aldi articles are always discount posts on this blog, so they
+        # carry enough weight to trigger the override below on their own.
+        ("lidl", 3), ("aldi", 3), ("im angebot", 3),
+        ("reduziert", 2), ("sale", 1), ("prozent auf", 3), ("guenstiger*", 1),
     )),
     ("in-eigener-sache", (
         ("vanityontour", 3), ("vanitycast", 3), ("expense logbook", 3),
@@ -96,6 +99,8 @@ _RULES: tuple[tuple[str, tuple[tuple[str, int], ...]], ...] = (
         ("kassettentoilette*", 3), ("toilette*", 2), ("gaswarner", 3), ("rauchmelder", 3),
         ("feuerloescher", 3), ("co melder", 3), ("router", 3), ("mobilfunk", 3), ("wlan", 3),
         ("lte", 3), ("5g", 3), ("internet", 2), ("buchtipp*", 2),
+        ("duschzelt*", 3), ("kuppelzelt*", 3), ("pop-up-zelt*", 3), ("messer", 3),
+        ("stuhl", 3), ("faltstuhl*", 3), ("klappstuhl*", 3),
     )),
     ("campingplaetze", (
         ("campingplatz*", 3), ("campingplaetze", 3), ("5-sterne*", 3), ("fuenf sterne", 3),
@@ -145,7 +150,11 @@ _RULES: tuple[tuple[str, tuple[tuple[str, int], ...]], ...] = (
         ("rundreise*", 3), ("roadtrip*", 3), ("reisebericht*", 3), ("ausflugsziel*", 3),
         ("kurztrip*", 3), ("europa", 2), ("kueste", 2), ("region", 1), ("uckermark", 3),
         ("lausitz", 3), ("schwaebische alb", 3), ("ausflug*", 2), ("geheimtipp*", 2),
-        ("uebersee", 2), ("kanada", 3),
+        ("uebersee", 2), ("kanada", 3), ("pfalz", 1), ("erzgebirge", 2),
+        ("spreewald", 2), ("vogtland", 2), ("rhoen", 2), ("odenwald", 2),
+        ("chiemsee", 2), ("ammersee", 2), ("muensterland", 2), ("ostfriesland", 2),
+        ("emsland", 2), ("altmuehltal", 2), ("teutoburger wald", 2), ("taunus", 2),
+        ("westerwald", 2), ("bergisches land", 2), ("nordwesten", 2),
     )),
     ("camping-tipps", (
         ("tipp", 3), ("tipps", 3), ("tricks", 3), ("ratgeber", 3), ("anleitung", 3),