PRICE-01: price_service provider, fallback chain, and the gate read from it

A new price source, `price_provider: price_service`: the owner's price server,
one fixed HTTPS host, a bearer token (new password option
`price_service_token`), wholesale energy only so markup and taxes are added as
for generic_dayahead.

The chain is server, then energy-charts, then the prices the history store
kept. A step counts only if it has a price for now. Each step down and back up
is one log line. With every source down a site plans from what it saved.

No price for now: one status row, one Home plan line and one notification, in
English and Dutch, cleared when a price returns. With this provider the
maintenance charge gate reads the provider's prices and keeps the Home
Assistant rule: the current 15-minute price is at or below today's average.

The token is hidden on the settings page, refused when missing, and taken out
of any error text. Other providers, `off` and the Home Assistant pair take the
road they always took (scripted-day probe against 0ce7d35: one line differs,
the refusal that lists the known providers). See
DECISIONS/PRICE-01-own-price-server.md.

Co-Authored-By: Claude <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Bdqr7PiaHcBnzPituu2yTC

goodwe_controller/test_price.py

@@ -534,11 +534,15 @@ FIXTURES = {
                          [v / 1000 for v in EPEX_EUR_MWH]),
     "custom_formula": (columnar_feed(EPEX_EUR_MWH), FORMULA_EUR_KWH),
     "manual_csv": (None, [0.1834, -0.0210, 0.3115]),
+    # PRICE-01: the owner's price server answers the same columnar layout.
+    "price_service": (columnar_feed(EPEX_EUR_MWH),
+                      [v / 1000 for v in EPEX_EUR_MWH]),
 }
 
 check(f"the plugins that ship after TARIFF-07 and TARIFF-15 are registered "
       f"{sorted(PROVIDERS)}",
-      set(PROVIDERS) == {"generic_dayahead", "custom_formula", "manual_csv"})
+      set(PROVIDERS) == {"generic_dayahead", "custom_formula", "manual_csv",
+                         "price_service"})
 check(f"...and the three withdrawn ids resolve to NOTHING "
       f"{sorted(RETIRED_PROVIDERS)}",
       set(RETIRED_PROVIDERS) == {"engie_dynamic", "totalenergies_dynamic",
@@ -571,7 +575,7 @@ def canned(body):
     """A transport that serves recorded bytes and records that it was used."""
     calls = []
 
-    async def t(url, timeout_s):
+    async def t(url, timeout_s, headers=None):
         calls.append((url, timeout_s))
         return body
     t.calls = calls
@@ -603,6 +607,9 @@ def load_any(pid):
         # is exactly what section 3 grades.
         return load(pid, {"price_formula": json.dumps(ENECO_CARD)},
                     transport=canned(body))
+    if pid == "price_service":
+        return load(pid, {"price_service_token": "test-token-1234"},
+                    transport=canned(body))
     return load(pid, transport=canned(body))
 
 
@@ -898,7 +905,16 @@ _networked = sorted(pid for pid, cls in PROVIDERS.items()
 # SAME CAPTURED BYTES (section 13c), because it reads the same endpoint with
 # the same parser. A networked plugin with no capture is what this line exists
 # to forbid.
-_replayed = ["custom_formula", "generic_dayahead"]
+#
+# ⚠️ PRICE-01 PUT A THIRD ON IT, AND ITS CAPTURE IS A RESHAPE, SAID PLAINLY. The
+# price server answers only to a token this session does not hold, so no real
+# answer of its own exists to replay. Its answer is the energy-charts layout
+# (design, API section), so test_price_service.py replays the REAL energy-charts
+# two-day capture with the three extra keys the design lists (`covers`,
+# `source`, `fetched_at`). The prices and instants are real; the wrapper is the
+# design's. The first answer captured from the live server on the rig test
+# replaces it - that is the open item, and it is in the PRICE-01 report.
+_replayed = ["custom_formula", "generic_dayahead", "price_service"]
 check(f"the networked plugins are {_networked}, and EVERY one of them is "
       f"replayed from a captured real body ({_replayed}) - no shipped plugin "
       f"reaches a network this file has never seen answer (TARIFF-07)",
@@ -1252,7 +1268,7 @@ check(f"a negative day-ahead price passes through, all-in {_neg}",
 # (TARIFF-15): it reads the SAME columnar document, which has no per-point
 # flag, and applies arithmetic to it - arithmetic cannot invent a provenance
 # the document never carried.
-_SETTLED_FEED = {"generic_dayahead", "custom_formula"}
+_SETTLED_FEED = {"generic_dayahead", "custom_formula", "price_service"}
 for pid in sorted(set(READS) - _SETTLED_FEED):
     read = READS[pid]
     flags = derived(lambda r=read: [p.provisional for p in r.points])