fix(transform+content): unblock SQLMesh plan — three pipeline fixes

stg_playtomic_availability:
- Add maximum_object_size = 134217728 (128 MB) to both read_json calls;
  daily files exceed the 16 MB default as venue count grows
- Add seed recheck file (1970-01-01_recheck_00.json.gz, gitignored with data/)
  to avoid READ_JSON IOException when no recheck files exist

pseo_city_costs_de + pseo_city_pricing:
- Add QUALIFY ROW_NUMBER() OVER (PARTITION BY city_slug ...) = 1 to
  deduplicate rows caused by dim_cities' loose LIKE join; reduces
  pseo_city_costs_de from 2.6M → 222 rows (one per unique city)

content/__init__.py:
- DuckDB lowercases all column names at rest ("ratePeak" → "ratepeak"),
  so calc_overrides dict comprehension never matched DEFAULTS keys.
  Fix: build case-insensitive reverse map {k.lower(): k} and normalise
  row keys before lookup. Applied in both generate_articles() and
  preview_article().

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

web/src/padelnomics/content/__init__.py

@@ -306,7 +306,14 @@ async def generate_articles(
             # Calculator content type: create scenario
             scenario_slug = None
             if config["content_type"] == "calculator":
-                calc_overrides = {k: v for k, v in row.items() if k in DEFAULTS}
+                # DuckDB lowercases all column names; build a case-insensitive
+                # reverse map so "ratepeak" (stored) matches "ratePeak" (DEFAULTS).
+                _defaults_ci = {k.lower(): k for k in DEFAULTS}
+                calc_overrides = {
+                    _defaults_ci[k.lower()]: v
+                    for k, v in row.items()
+                    if k.lower() in _defaults_ci and v is not None
+                }
                 state = validate_state(calc_overrides)
                 d = calc(state, lang=lang)
 
@@ -479,7 +486,14 @@ async def preview_article(
 
     # Calculator: compute scenario in-memory
     if config["content_type"] == "calculator":
-        calc_overrides = {k: v for k, v in row.items() if k in DEFAULTS}
+        # DuckDB lowercases all column names; build a case-insensitive
+        # reverse map so "ratepeak" (stored) matches "ratePeak" (DEFAULTS).
+        _defaults_ci = {k.lower(): k for k in DEFAULTS}
+        calc_overrides = {
+            _defaults_ci[k.lower()]: v
+            for k, v in row.items()
+            if k.lower() in _defaults_ci and v is not None
+        }
         state = validate_state(calc_overrides)
         calc(state, lang=lang)  # validate state produces valid output
         ctx["scenario_slug"] = slug + "-" + str(row[natural_key])