feat(installer): set container resource limits on a new TestGen install

[aarthy-dk]

Both services ran with no ceiling at all. That reads as generous and is the opposite: with no limit there is nothing for the container to hit, so the host runs out of memory instead and the kernel picks a victim by size -- which can be the database, or anything else sharing the machine. With a limit, a run that exhausts memory is confined to the container it started in and the rest keeps serving.

Sized for the 4 CPU / 16 GB virtual machine the enterprise install guide asks for, matching the example compose files that ship with TestGen. They are ceilings rather than reservations, so the two overlap deliberately and a smaller evaluation machine simply never reaches them.

New installs only. The upgrade path patches an existing compose file key by key and is deliberately left alone: imposing a ceiling on a running install could start killing work that fits the machine it was sized for, and that decision belongs to whoever sized it. A test pins that, so a later backfill has to be deliberate.

Note this is new installs by compose file, not by command -- tg install re-uses a compose file it finds on disk, so an install that follows a delete --keep-config keeps the old one, limits included.

[github-actions]

Coverage Report •

File	Stmts	Miss	Cover	Missing
dk-installer.py	1936	382	80%	169–170, 174–175, 187–199, 227–228, 231, 236–240, 250–251, 260–272, 277, 290, 336–337, 401, 441–448, 455, 467, 489–490, 539, 589–592, 611–612, 614, 664–693, 697–734, 765–783, 854, 925–926, 994, 1011–1012, 1029–1034, 1108–1109, 1119, 1135–1139, 1142, 1145, 1148, 1159–1192, 1301, 1307, 1353, 1356, 1363–1364, 1370–1372, 1532–1547, 1550–1561, 1578–1579, 1616–1617, 1643–1644, 1651, 1656, 1662–1663, 1696–1699, 1708–1709, 1714–1715, 1788–1790, 2080–2083, 2175–2178, 2215, 2244, 2269–2271, 2279–2281, 2339, 2341, 2343, 2468–2469, 2487, 2517, 2526, 2529–2531, 2574–2586, 2591–2598, 2606–2616, 2765–2778, 2812–2813, 2853–2854, 2868, 2927, 2946–2947, 3199–3201, 3204–3206, 3277, 3342, 3347, 3399–3401, 3404–3406, 3432–3435, 3473–3475, 3478–3480, 3507–3512, 3618–3620, 3628–3632, 3696–3698, 3705–3707, 3718–3721, 3726–3727, 3733–3734, 3745–3754, 3763–3817, 3861–3876
TOTAL	1936	382	80%

Tests	Skipped	Failures	Errors	Time
262	0 💤	0 ❌	0 🔥	2.853s ⏱️