PRICE-01: migration note, and the tests drive the real control cycle

- DOCS: the migration note said markup and taxes do not matter; with the
  provider they are added to the wholesale price. Step 4 and 5 now say what
  they set and what static_profile does while no source has a price.
- The gap tests run the notification through cycle(), where the check is
  called, so a check that is never called goes red.
- test header: the real-transport checks are section 11.

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

goodwe_controller/test_price_service.py

@@ -21,7 +21,7 @@ THE SERVER IS A MOCK. This session holds no token, so it cannot ask the real
 one for a price. `Server` below answers the layout the design's API section
 gives (`unix_seconds`, `price`, `unit`, `zone`, `covers`, `source`,
 `fetched_at`), over a transport with the same contract as `price.https_get`.
-Section 12 drives the REAL `https_get` against a local aiohttp server, for the
+Section 11 drives the REAL `https_get` against a local aiohttp server, for the
 parts a mock transport cannot show: the header on the wire, the status words,
 the timeout, a refused connection.
 
@@ -637,6 +637,9 @@ class FakeHass:
     async def number(self, entity, invert=False):
         return self.values.get(entity)
 
+    async def set_number(self, entity, value):
+        return True
+
     async def call(self, domain, service, data):
         self.calls.append((domain, service, data))
         return True
@@ -730,11 +733,13 @@ class Wired:
         await asyncio.wait_for(task, timeout=5)
 
     async def tick(self, now=None):
-        """One 30 s tick: read inputs, then the price-gap check."""
+        """One control tick as `run_control` makes it: read inputs, then the
+        cycle, which is where the price-gap check is called from."""
         if now is not None:
             self.clock.now = now
+        self.ctl.auto = True
         await self.ctl.read_inputs()
-        await self.ctl.check_price_gap()
+        await self.ctl.cycle()
 
     def notes(self):
         return [(s, d) for dom, s, d in self.ctl.hass.calls