Fixes#667
## Changes
## Summary
Implemented persistent top-100 candidate pool in `tools/push3-evolution/evolve.sh`:
### Changes
**`--run-id <N>` flag** (line 96)
- Optional integer; auto-increments from highest `run` field in `manifest.jsonl` when omitted
- Zero-padded to 3 digits (`001`, `002`, …)
**Seeds pool constants** (after path canonicalization)
- `SEEDS_DIR` → `$SCRIPT_DIR/seeds/`
- `POOL_MANIFEST` → `seeds/manifest.jsonl`
- `ADMISSION_THRESHOLD` → `6000000000000000000000` (6e21 wei)
**`--diverse-seeds` mode** now has two paths:
1. **Pool mode** (pool non-empty): random-shuffles the pool and takes up to `POPULATION` candidates — real evolved diversity, not parametric clones
2. **Fallback** (pool empty): original `seed-gen-cli` parametric variant behavior
- Both paths fall back to mutating `--seed` to fill any shortfall
**Step 5 — End-of-run admission** (after the diff step):
1. Scans all `generation_*.jsonl` in `OUTPUT_DIR` for candidates with `fitness ≥ 6e21`
2. Maps `candidate_id` (e.g. `gen2_c005`) back to `.push3` files in `WORK_DIR` (still exists since cleanup fires on EXIT)
3. Deduplicates by SHA-256 content hash against existing pool
4. Names new files `run{RUN_ID}_gen{N}_c{MMM}.push3`
5. Merges with existing pool, sorts by fitness descending, keeps top 100
6. Copies admitted files to `seeds/`, removes evicted evolved files (never hand-written), rewrites `manifest.jsonl`
Co-authored-by: openhands <openhands@all-hands.dev>
Reviewed-on: https://codeberg.org/johba/harb/pulls/683
Reviewed-by: review_bot <review_bot@noreply.codeberg.org>
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