Remove Trino: Superset reads fuel-db directly as fuel_ro (PD-14)

trino/ deleted; the role trino_ro becomes fuel_ro, its password read from a
secret file at connect time; dashboards' SQL and column list for PostgreSQL;
the Compose project is renamed petrolyst, with volumes pinned to their old
names. AGENTS.md points to the architecture context. Not deployed: the next
deploy needs README's one-time steps first.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

petrolyst-insights/dashboards/atoma/build_bundle.py

@@ -5,7 +5,7 @@ Implements SPEC.md in this folder: the two dashboards the Petrolyst app embeds,
 (atoma-overview) and "ATOMA · Site" (atoma-site, the four detail tabs), one dataset per
 public.v_* view and every chart. Nothing in the bundle names a site.
 
-    build_bundle.py --database-uuid <uuid of "Fuel (Trino)"> [--out atoma-dashboards.zip]
+    build_bundle.py --database-uuid <uuid of "Fuel"> [--out atoma-dashboards.zip]
 
 The database uuid differs per Superset instance; `import_bundle.py --show-database`
 prints it. Output is deterministic: the same inputs give a byte-identical zip,
@@ -37,8 +37,10 @@ import yaml
 HERE = Path(__file__).resolve().parent
 VERSION = "1.0.0"
 NAMESPACE = uuid.uuid5(uuid.NAMESPACE_URL, "https://petrolyst.com/superset/atoma-dashboards")
-DATABASE_NAME = "Fuel (Trino)"
-DATABASE_URI = "trino://superset@trino:8080/fuel"  # as superset-init registers it
+DATABASE_NAME = "Fuel"
+# As superset-init registers it: fuel-db directly, as the read-only role fuel_ro. The password
+# comes from a secret file at connect time (superset_config.py), never from the bundle.
+DATABASE_URI = "postgresql+psycopg2://fuel_ro@fuel-db:5432/fuel"
 CATALOG, SCHEMA = "fuel", "public"
 
 SITE_FILTER = "NATIVE_FILTER-site"
@@ -69,7 +71,7 @@ MAIN_DTTM = {
     "v_electricity_cost": "bill_month",
 }
 
-# Calculated columns: (name, Trino SQL, type, label). The Petrolyst server's site_status
+# Calculated columns: (name, PostgreSQL SQL, type, label). The Petrolyst server's site_status
 # (petrolyst-platform server/) shows the same two texts.
 CALCULATED = {
     "v_site": [
@@ -93,7 +95,7 @@ CALCULATED = {
     ],
 }
 
-# Virtual datasets: name -> (view it extends, extra output columns, Trino SQL).
+# Virtual datasets: name -> (view it extends, extra output columns, PostgreSQL SQL).
 # coverage_detail feeds S3. The view's lane names start with a sort number ("1 Stock
 # intervals"), which reads as a count on the chart, so it adds lane_name without the number
 # (the chart still sorts by lane). Its amount column is the tooltip: the litres delivered in a
@@ -106,7 +108,7 @@ CALCULATED = {
 # day cannot be told apart. Everywhere else the date window is exact: on a single-visit day the
 # opening visit's delivery is included and the closing visit's excluded.
 VIRTUAL = {
-    "coverage_detail": ("v_coverage", [("lane_name", "varchar(60)"), ("amount", "varchar(120)")], """\
+    "coverage_detail": ("v_coverage", [("lane_name", "character varying(60)"), ("amount", "character varying(120)")], """\
 SELECT c.site_uid, c.site_code, c.site_name, c.site_label, c.lane, c.status,
        c.start_on, c.end_on, c.start_ts, c.end_ts,
        regexp_replace(c.lane, '^[0-9]+ ', '') AS lane_name,
@@ -114,19 +116,19 @@ SELECT c.site_uid, c.site_code, c.site_name, c.site_label, c.lane, c.status,
               CASE WHEN f.ambiguous THEN 'not attributed: a delivery on a day with several visits (see Deliveries)'
                    WHEN f.filled_l IS NULL AND coalesce(f.n_unknown, 0) = 0 THEN 'no delivery'
                    WHEN f.filled_l IS NULL THEN 'filled, quantity not recorded'
-                   ELSE format('%,.0f L filled', CAST(f.filled_l AS double)) END
+                   ELSE to_char(round(f.filled_l), 'FM999,999,999,990') || ' L filled' END
               || CASE WHEN f.n_unknown > 0 AND f.filled_l IS NOT NULL AND NOT f.ambiguous
                       THEN ', plus ' || CAST(f.n_unknown AS varchar) || ' of unknown quantity' ELSE '' END
             WHEN c.lane = '4 Electricity bills' THEN
               CASE WHEN b.n_bills > 1 THEN 'several bills start this day (see Electricity bills)'
                    WHEN b.disputed THEN 'bill disputed, amount withheld'
                    WHEN b.amount IS NULL THEN 'bill amount not recorded'
-                   ELSE format('%,.0f AFN billed (inferred)', CAST(b.amount AS double)) END
+                   ELSE to_char(round(b.amount), 'FM999,999,999,990') || ' AFN billed (inferred)' END
        END AS amount
 FROM public.v_coverage c
 LEFT JOIN (SELECT s.site_uid, s.start_on, s.end_on,
                   sum(CASE WHEN d.delivery_date < s.end_on THEN d.delivered_l END) AS filled_l,
-                  count_if(d.delivery_date < s.end_on AND d.delivered_l IS NULL) AS n_unknown,
+                  count(*) FILTER (WHERE d.delivery_date < s.end_on AND d.delivered_l IS NULL) AS n_unknown,
                   bool_or(d.delivery_date IN (s.start_on, s.end_on) AND m.site_uid IS NOT NULL) AS ambiguous
            FROM (SELECT DISTINCT site_uid, start_on, end_on FROM public.v_coverage
                  WHERE lane = '1 Stock intervals') s
@@ -216,8 +218,8 @@ def read_columns(path: Path) -> dict[str, list[tuple[str, str]]]:
     return views
 
 
-def superset_type(trino_type: str) -> str:
-    return trino_type.upper().replace(",", ", ")
+def superset_type(data_type: str) -> str:
+    return data_type.upper().replace(",", ", ")
 
 
 def dataset_yaml(view: str, columns: list[tuple[str, str]], database_uuid: str) -> dict[str, Any]:
@@ -968,7 +970,7 @@ def build(database_uuid: str, columns_path: Path) -> dict[str, Any]:
     views = read_columns(columns_path)
     files: dict[str, Any] = {
         "metadata.yaml": {"version": VERSION, "type": "Dashboard", "timestamp": "2026-10-24T00:00:00+00:00"},
-        "databases/Fuel_Trino.yaml": {
+        "databases/Fuel.yaml": {
             "database_name": DATABASE_NAME,
             "sqlalchemy_uri": DATABASE_URI,
             "cache_timeout": None,
@@ -988,7 +990,7 @@ def build(database_uuid: str, columns_path: Path) -> dict[str, Any]:
     for name, (base, extra, _) in VIRTUAL.items():
         views[name] = views[base] + extra
     for view in sorted(views):
-        files[f"datasets/Fuel_Trino/{view}.yaml"] = dataset_yaml(view, views[view], database_uuid)
+        files[f"datasets/Fuel/{view}.yaml"] = dataset_yaml(view, views[view], database_uuid)
 
     # PD-12: the Petrolyst app embeds the Overview and one site dashboard, whose four detail
     # tabs are Superset's own (owner, 29 Oct). The app shows the site header and chooses site
@@ -1083,7 +1085,7 @@ def write_zip(files: dict[str, Any], out: Path) -> None:
 def main(argv: list[str] | None = None) -> int:
     parser = argparse.ArgumentParser(description=__doc__.split("\n\n")[0])
     parser.add_argument("--database-uuid", required=True, type=uuid.UUID,
-                        help='uuid of the "Fuel (Trino)" database in the target Superset')
+                        help='uuid of the "Fuel" database in the target Superset')
     parser.add_argument("--columns", type=Path, default=HERE / "columns.tsv")
     parser.add_argument("--out", type=Path, default=Path("atoma-dashboards.zip"))
     args = parser.parse_args(argv)