coldstart: track the in-progress run logs

The four seed-0 runs are live; their progress logs are the improvement
history DESIGN.md cites for a long run (cf. evolve-3M*.log). Tracking them
now so nothing is stranded if the container is reclaimed mid-run -- the
runner rewrites them on each completion anyway.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MJ84Feep79Hhm3E4zZJmnB

examples/harbor-house/coldstart-500000-s0.log

@@ -0,0 +1,23 @@
+WARNING: 418 m2 per storey needs ~86 m of daylit wall; the plot's non-private perimeter gives 53 m. Roughly 49 m2 of courtyard closes the gap. (DESIGN.md §38.3)
+seed         : /home/user/homemaker-layout/examples/harbor-house/init.dom
+programme    : harbor-house
+budget       : 500000
+pop          : 16
+child_budget : 80
+workers      : 1
+rng seed     : 0
+leaf sharing : True (factor=3)
+superpose    : False
+multi_use    : False
+conn grade   : False
+use tiers    : False
+bridge circulation : False
+ruin recreate      : False
+collapse in-search : True
+shapecurve warmstart : False
+shapecurve prune     : False
+output       : /home/user/homemaker-layout/examples/harbor-house/coldstart-500000-s0.dom
+[    80 evals] best 2.04467e-27 (fails 79) via construct/0
+[   240 evals] best 6.52063e-20 (fails 55) via construct/2
+[  1280 evals] best 3.07967e-20 (fails 54) via construct/15
+[  1760 evals] best 1.59184e-19 (fails 54) via swap 0/lrr

examples/health-centre/coldstart-500000-s0.log

@@ -0,0 +1,22 @@
+WARNING: programme demands 240 m2 per storey on a 183 m2 plot (131%). Every room will be squeezed below its target however long the search runs. (DESIGN.md §39.11)
+WARNING: 240 m2 per storey needs ~49 m of daylit wall; the plot's non-private perimeter gives 41 m. Roughly 12 m2 of courtyard closes the gap, but only -57 m2 of plot is spare. (DESIGN.md §38.3)
+seed         : /home/user/homemaker-layout/examples/health-centre/init.dom
+programme    : health-centre
+budget       : 500000
+pop          : 16
+child_budget : 80
+workers      : 1
+rng seed     : 0
+leaf sharing : True (factor=3)
+superpose    : False
+multi_use    : False
+conn grade   : False
+use tiers    : False
+bridge circulation : False
+ruin recreate      : False
+collapse in-search : True
+shapecurve warmstart : False
+shapecurve prune     : False
+output       : /home/user/homemaker-layout/examples/health-centre/coldstart-500000-s0.dom
+[    80 evals] best 7.05564e-20 (fails 53) via construct/0
+[   400 evals] best 1.03209e-17 (fails 47) via construct/4

examples/maple-court/coldstart-500000-s0.log

@@ -0,0 +1,21 @@
+WARNING: 338 m2 per storey needs ~70 m of daylit wall; the plot's non-private perimeter gives 55 m. Roughly 22 m2 of courtyard closes the gap. (DESIGN.md §38.3)
+seed         : /home/user/homemaker-layout/examples/maple-court/init.dom
+programme    : maple-court
+budget       : 500000
+pop          : 16
+child_budget : 80
+workers      : 1
+rng seed     : 0
+leaf sharing : True (factor=3)
+superpose    : False
+multi_use    : False
+conn grade   : False
+use tiers    : False
+bridge circulation : False
+ruin recreate      : False
+collapse in-search : True
+shapecurve warmstart : False
+shapecurve prune     : False
+output       : /home/user/homemaker-layout/examples/maple-court/coldstart-500000-s0.dom
+[    80 evals] best 1.5923e-44 (fails 136) via construct/0
+[   160 evals] best 4.80951e-39 (fails 119) via construct/1

examples/programme-house/coldstart-500000-s0.log

@@ -0,0 +1,32 @@
+seed         : /home/user/homemaker-layout/examples/programme-house/init.dom
+programme    : programme-house
+budget       : 500000
+pop          : 16
+child_budget : 80
+workers      : 1
+rng seed     : 0
+leaf sharing : True (factor=3)
+superpose    : False
+multi_use    : False
+conn grade   : False
+use tiers    : False
+bridge circulation : False
+ruin recreate      : False
+collapse in-search : True
+shapecurve warmstart : False
+shapecurve prune     : False
+output       : /home/user/homemaker-layout/examples/programme-house/coldstart-500000-s0.dom
+[    80 evals] best 9.96032e-11 (fails 17) via construct/0
+[   160 evals] best 5.18243e-09 (fails 16) via construct/1
+[   320 evals] best 9.65534e-06 (fails 7) via construct/3
+[  1920 evals] best 1.96478e-05 (fails 7) via place_missing noop
+[  2480 evals] best 1.9751e-05 (fails 7) via place_missing noop
+[  2880 evals] best 1.99208e-05 (fails 7) via place_missing noop
+[  3120 evals] best 2.00298e-05 (fails 7) via core_undivide noop
+[  4640 evals] best 7.04607e-05 (fails 5) via crossover rl<->ll
+[  6000 evals] best 7.06394e-05 (fails 5) via level_fix noop
+[  7280 evals] best 7.07633e-05 (fails 5) via level_retype 0/rrl<->1/rl
+[  7680 evals] best 7.11015e-05 (fails 5) via core_undivide noop
+[  7840 evals] best 7.11352e-05 (fails 5) via core_divide noop
+[  8400 evals] best 0.000111875 (fails 5) via undivide 0/rr
+[  8480 evals] best 0.000114961 (fails 5) via core_undivide noop