fix: bundled dust cleanup — push3-evolution/evolve.sh (#210) (#987)

## Summary

Bundled dust cleanup for `push3-evolution/evolve.sh` subsystem:

- **#716**: Fix null-fitness crash in generation JSONL parsing — `int(d.get('fitness', 0))` → `int(d.get('fitness') or 0)` (avoids `TypeError: int() argument must be a string, a bytes-like object or a real number, not 'NoneType'` when fitness is JSON `null`)
- **#944**: Add `processExecIf_fix` to `ZERO_RATED_FLAGS` so inflated scores from that flag are zero-rated during pool admission/eviction
- **#945**: `fitness_flags` is comma-separated in practice — update `manifest.schema.json` description from 'Space-separated' to 'Comma-separated' and use `flags.split(',')` in `effective_fitness` instead of substring match
- Fix pre-existing SC2086: quote `$i` in `printf` argument (ShellCheck)

## Test plan
- [ ] ShellCheck passes on `tools/push3-evolution/evolve.sh`
- [ ] CI passes

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: openhands <openhands@all-hands.dev>
Reviewed-on: https://codeberg.org/johba/harb/pulls/987
Reviewed-by: Disinto_bot <disinto_bot@noreply.codeberg.org>

tools/push3-evolution/evolve.sh

@@ -423,7 +423,7 @@ PYEOF
 else
   # --- Default mode: N copies of the seed, each independently mutated ---
   for i in $(seq 0 $((POPULATION - 1))); do
-    CAND_FILE="$GEN_DIR/candidate_$(printf '%03d' $i).push3"
+    CAND_FILE="$GEN_DIR/candidate_$(printf '%03d' "$i").push3"
     MUTATED=$(run_mutate_cli mutate "$SEED" "$MUTATION_RATE") \
       || fail "Failed to mutate seed for initial candidate $i"
     printf '%s\n' "$MUTATED" > "$CAND_FILE"
@@ -814,7 +814,7 @@ for fname in sorted(os.listdir(output_dir)):
             try:
                 d       = json.loads(line)
                 cid     = d.get('candidate_id', '')
-                fitness = int(d.get('fitness', 0))
+                fitness = int(d.get('fitness') or 0)
                 if fitness < threshold:
                     continue
                 # Canonical CID format is "candidate_XXX" (zero-padded numeric suffix,
@@ -889,11 +889,12 @@ if not new_items:
 # Add new inflation/distortion flags here; no other code change is required.
 ZERO_RATED_FLAGS = {
     'token_value_inflation',
+    'processExecIf_fix',
 }
 
 def effective_fitness(entry):
     flags = entry.get('fitness_flags') or ''
-    if any(flag in flags for flag in ZERO_RATED_FLAGS):
+    if any(flag in flags.split(',') for flag in ZERO_RATED_FLAGS):
         return 0
     return int(entry.get('fitness') or 0)
 

tools/push3-evolution/seeds/manifest.schema.json

@@ -17,7 +17,7 @@
     },
     "fitness_flags": {
       "type": ["string", "null"],
-      "description": "Space-separated flags that qualify or invalidate the fitness value (e.g. token_value_inflation). null when no flags apply."
+      "description": "Comma-separated flags that qualify or invalidate the fitness value (e.g. token_value_inflation). null when no flags apply."
     },
     "origin": {
       "type": "string",