deps: pin engine base to pyrmts 7219b34 (polars/pyarrow pinned upstream)

pyrmts now pins `polars==1.44.1` / `pyarrow==22.0.0` (7219b34) so the Batch
image build is deterministic instead of resolving whatever's newest — the
drift that shipped the smg-v1 `unpivot` crash. Re-point the trio + the
engine Dockerfile base at `7219b34` and relock: ctbk's env now resolves the
SAME polars prod runs (1.44.1, up from 1.41.2), while keeping pyarrow 22.0.0
for byte-reproducible parquet. Full suite green on the aligned versions, so
local tests now exercise prod's polars.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GgLAzeRJeNeyizG4XHWRBK

Author: ryan-williams

gbfs/engine/Dockerfile

@@ -5,7 +5,7 @@
 # Build from the ctbk REPO ROOT (the context needs ctbk/ + configs/):
 #   pyrmts-engine batch push -c . -f gbfs/engine/Dockerfile -p linux/arm64 \
 #     006196295121.dkr.ecr.us-east-1.amazonaws.com/ctbk-engine:$(git rev-parse --short HEAD)
-FROM 006196295121.dkr.ecr.us-east-1.amazonaws.com/pyrmts-engine:a174254
+FROM 006196295121.dkr.ecr.us-east-1.amazonaws.com/pyrmts-engine:7219b34
 
 # `station_chain` vocab expansion (ctbk_vocab).
 RUN pip install --no-cache-dir s2cell==1.8.0

pyproject.toml

@@ -46,9 +46,9 @@ dependencies = [
 # worktree re-hash) — kills the phantom leaf-dep-hash a level-parallel `-f`
 # reproc would otherwise record, which our audit diff must not see as a finding.
 dvx           = { git = "https://github.com/runsascoded/dvx.git", rev = "39062ef09" }
-pyrmts        = { git = "https://github.com/runsascoded/pyrmts.git", rev = "a174254", subdirectory = "python/pyrmts" }
-pyrmts-engine = { git = "https://github.com/runsascoded/pyrmts.git", rev = "a174254", subdirectory = "python/pyrmts_engine" }
-pyrmts-ops    = { git = "https://github.com/runsascoded/pyrmts.git", rev = "a174254", subdirectory = "python/pyrmts_ops" }
+pyrmts        = { git = "https://github.com/runsascoded/pyrmts.git", rev = "7219b34", subdirectory = "python/pyrmts" }
+pyrmts-engine = { git = "https://github.com/runsascoded/pyrmts.git", rev = "7219b34", subdirectory = "python/pyrmts_engine" }
+pyrmts-ops    = { git = "https://github.com/runsascoded/pyrmts.git", rev = "7219b34", subdirectory = "python/pyrmts_ops" }
 # Local (dev) — swap all three together (the Python `pds l`): from ctbk, the
 # `pyrmts` entry here is what resolves `pyrmts-engine`'s own `pyrmts` dep (its
 # workspace source only applies inside the pyrmts repo). Don't commit this