Merge upstream springfall2008/batpred v8.48.1 into the fork

Brings in 65 upstream commits on top of the Pi's local work. 43 non-test
source files merged with no conflict at all; the six that did are resolved
so both sides survive rather than one overwriting the other:

- axle.py: upstream's springfall2008#4520 fix (an export event boosts the import rate too,
  since charging during the window carries the same opportunity cost) kept,
  wrapped in this fork's guard that only applies minutes the rate data still
  covers, so a session that has scrolled out is not re-applied every run.
- inverter.py: upstream's two-source readback (Control.Discharge_Target_SOC_1
  first, raw.invertor as fallback) and its "unreadable register is left alone"
  guard, plus this fork's rest_write_acknowledged() fallback for hardware where
  the register is absent from GivTCP's read map entirely and no readback can
  ever confirm a write that did land. The two cases are distinct and both are
  now handled.
- predbat.py: fork version string and watchdog constants kept.
- annual.py: upstream's baseline_tariff threading applied to BOTH the gas and
  the heat pump leg - the two legs' no_pvbat scenarios are differenced against
  each other, so pricing one on the baseline tariff and the other on the main
  tariff would bias the heating answer.
- web_annual.py: upstream wins on the Octopus load-source prefill. Its
  reasoning applies directly here: the import meter already has PV and battery
  self-consumption subtracted, so modelling a system on top double-counts.
  The predheat heating prefill, which upstream has no equivalent of, is kept.
- prediction_kernel: ABI/parity bumped to 103/104, past this fork's 102/103 and
  upstream's 3/5, because both sides changed the context struct and the hot
  loop. Any binary built before this merge is now rejected at load time and
  falls back to the Python engine rather than being silently trusted.

annual_heat.py is added because the Pi's annual.py and web_annual.py import it
and it existed only on feat/annual-heat-pump - without it the tree does not
import at all.

Verified: merged kernel compiles under -Wall -Werror and PASSES parity across
450 configurations (nominal/pv10/pv90); unit_test.py --quick is 224 passed,
with the one pre-existing db_manager corruption failure that reproduces
identically on main without this merge.

prediction_kernel_lib_aarch64.so is rebuilt from the merged source (needs
GLIBC 2.32, container has 2.43). The other five architectures need zig, so
they stay stale until CI's kernel-binaries job rebuilds them - note that
workflow is on: pull_request, so it does not run on a push to main.

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

Author: dandwhelan

.cspell/custom-dictionary-workspace.txt

@@ -25,6 +25,7 @@ armhf
 armv
 ASHP
 asyncio
+authoriser
 autodocstring
 autoflake
 automations
@@ -76,6 +77,7 @@ corruptplans
 cprofile
 creds
 crosscharge
+customauthorizer
 customisation
 Customise
 cvalue
@@ -103,6 +105,8 @@ dend
 denorm
 derate
 derating
+desync
+desynced
 devcontainer
 devcontainers
 dexport
@@ -140,6 +144,7 @@ energythroughput
 enho
 Enlighten
 enlm
+enph
 enphase
 enphaseenergy
 Enpower
@@ -186,6 +191,7 @@ Ginlong
 GivEnergy
 givtcp
 gnueabihf
+GOELEC
 gridcode
 gridconsumption
 gridconsumptionpower
@@ -233,6 +239,7 @@ invname
 isinstance
 isoformat
 isort
+itemsize
 itemtype
 ivtime
 jedlix
@@ -292,11 +299,17 @@ minsoc
 minsocongrid
 minuteb
 misclick
+misdetect
+misdetected
+misdetecting
+misdetection
+mispairing
 Mixergy
 mkdocs
 mlugg
 Modbus
 mogons
+monkeypatched
 monokai
 Mosquitto
 mpan
@@ -329,6 +342,7 @@ OCPP
 octo
 octoplus
 octopoints
+Ofgem
 Ohme
 ohmepy
 Okabe
@@ -361,6 +375,7 @@ powerline
 Powerwall
 ppdetails
 ppkwh
+preclip
 pred
 predai
 predbat
@@ -369,6 +384,7 @@ predheat
 preseed
 preseeded
 prevs
+protobuf
 psum
 pvbat
 pvenergytotal
@@ -386,6 +402,8 @@ pytz
 randn
 rarr
 reactivepower
+readback
+readbacks
 recp
 redownload
 Referer
@@ -413,6 +431,7 @@ sapm
 saverestore
 savez
 scalarstring
+scalings
 searr
 securetoken
 Segoe
@@ -433,6 +452,10 @@ sigenergy
 sigenstor
 SIGSEGV
 Slee
+slugified
+slugifies
+slugify
+slugifying
 snakeviz
 socb
 socketloop
@@ -489,6 +512,7 @@ timeobj
 timestep
 timestr
 timezone
+tmpfs
 tmrw
 tojson
 tottime
@@ -499,9 +523,12 @@ treforsiphone
 treforsouthwell
 tunables
 twinx
+typecode
+typecodes
 tzfile
 tzpath
 unconfigured
+undiscounted
 unnormalised
 unparseable
 unsmoothed

.gitignore

@@ -46,6 +46,7 @@ coverage/*.txt
 coverage/*.db
 coverage/*.html
 coverage/*.prof
+coverage/*.py
 coverage/cache/
 coverage/debug/
 coverage/predbat_standalone/