Fix worker never picking up code changes after restart

docker compose restart worker looked like it should reflect new code
(docker-compose.yml bind-mounts ./app:/app/app for dev), but the
worker Dockerfile installed the app package non-editably (pip install
.), which copies a frozen snapshot into site-packages at image build
time. The bare `arq` console-script just imports whatever
site-packages says `app` is -- unlike uvicorn --reload, which
explicitly resolves its import string against the CWD -- so the
worker silently kept running whatever code existed at the last
`docker compose up --build`, no matter how many times it was
restarted or how recent the git pull was.

Confirmed live: after pulling the series/season ingestion pipeline
and restarting, the worker log still read "Starting worker for 2
functions: ingest_movie_task, ingest_person_task" -- proof it never
saw ingest_series_task/ingest_season_task at all.

Switching to `pip install -e .` makes site-packages point at /app by
absolute path instead of a frozen copy, so the same bind mount that
already worked for the API now actually reaches the worker process
too -- a plain restart after `git pull` is enough going forward.
Applied to both Dockerfiles for consistency, since the API's working
behavior was incidental to uvicorn, not something to rely on either.

Co-Authored-By: Claude Sonnet 5 <[email protected]>

docker/api.Dockerfile

@@ -17,7 +17,11 @@ RUN apt-get update \
     && rm -rf /var/lib/apt/lists/*
 COPY pyproject.toml ./
 COPY app ./app
-RUN pip install --no-cache-dir .
+# Editable install so site-packages resolves `app` by absolute path (/app)
+# rather than a frozen copy — consistent with worker.Dockerfile, and keeps
+# this correct even though uvicorn --reload happens to resolve its own
+# import string against the CWD regardless.
+RUN pip install --no-cache-dir -e .
 
 FROM base AS runtime
 RUN useradd --create-home --uid 1000 aurora

docker/worker.Dockerfile

@@ -17,7 +17,14 @@ RUN apt-get update \
     && rm -rf /var/lib/apt/lists/*
 COPY pyproject.toml ./
 COPY app ./app
-RUN pip install --no-cache-dir .
+# Editable install: site-packages ends up pointing at this /app directory by
+# absolute path rather than a frozen copy of it. That matters because the
+# `arq` console-script (unlike uvicorn --reload, which explicitly resolves
+# its app import against the CWD) just imports whatever site-packages says
+# `app` is — a non-editable install would permanently freeze the worker's
+# code at whatever this build saw, silently ignoring the dev bind mount
+# (docker-compose.yml's `./app:/app/app`) on every later `restart`.
+RUN pip install --no-cache-dir -e .
 
 FROM base AS runtime
 RUN useradd --create-home --uid 1000 aurora