fix(dev-image): pgvector reccomended installs flakes pupeline

[sfreudenthaler]

Every release is currently blocked: the dev-image arm64 (QEMU) build fails on apt install postgresql-$PG_VERSION-pgvector because the recommends chain drags in networkd-dispatcher/python3-gi, whose maintainer scripts try to wire systemd-resolved inside the container and die under emulation (newly fatal after a 2026-07-29 Ubuntu noble package update; observed on release run 30495772928 / v26.07.28-01, which then skipped Release, Release-Notes, Promote-latest, and Changelog publish).

One flag: --no-install-recommends — the DB container needs pgvector, not Ubuntu's network-management stack. Also slims the image.

Closes: #36806

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https://claude.ai/code/session_012ogYXVeZsBVUHkwzdStYPJ

[claude]

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Code Review

Change: docker/dev-env/Dockerfile:42 — add --no-install-recommends to the pgvector install.

-RUN apt install -y postgresql-$PG_VERSION-pgvector
+RUN apt install -y --no-install-recommends postgresql-$PG_VERSION-pgvector

This is correct and does exactly what the PR describes. --no-install-recommends stops apt from pulling the recommended-but-not-required chain (networkd-dispatcher → python3-gi), whose postinst wires up systemd-resolved and fails under QEMU emulation. The DB container needs the pgvector extension, not Ubuntu's network-management stack, so dropping recommends here is the right scope — and it also slims the image.

Notes (non-blocking, pre-existing — outside this diff)

• docker/dev-env/Dockerfile:42 — this line uses apt while the rest of the file uses apt-get (apt prints "unstable CLI interface" warnings in scripts). Not introduced by this PR and not worth churning here, but worth aligning in a future cleanup.
• The install correctly runs after apt.postgresql.org.sh (line 41) adds the PGDG repo, so postgresql-$PG_VERSION-pgvector resolves. --no-install-recommends does not affect the hard dependency on postgresql-$PG_VERSION, which stays installed. ✅

Verdict

No issues found. The one-line change is minimal, targeted, and matches the --no-install-recommends convention already used on line 36. Safe to merge.
· issue-36806-pgvector-no-recommends

[sfreudenthaler]

Extended per a repo-wide survey: every apt install in shipped Dockerfiles already used --no-install-recommends except two — the pgvector line this PR fixes, and one stray postgresql-client-16 install in docker/pg-base/Dockerfile (clearly appended after the flagged line above it). Second commit brings that one in line; the repo is now consistent.

[sfreudenthaler]

Scope reduced back to the dev-env pgvector fix only — the pg-base change moves to its own PR (with a client 16→18 bump, per RDS version survey) so backup-image changes get their own review.