feat: apply MOSS-grounded self-evolution improvements to ADAM

Implements 7 improvements grounded in MOSS paper (arXiv 2605.22794):

1. Transcript capture (§3.4): context_ring buffer in adam-observe.mjs
   captures last 8 events around struggle signals as context_window.

2. Evidence batching (§3.1): new adam-batch.mjs pre-clusters windowed
   journal entries into coherent failure batches by (signal_type, cluster_key).

3. Multi-stage analysis (§3.3): SKILL.md dispatches adam agent in two
   stages (diagnose+plan → implement) with inter-stage validation gate.

4. Pre-apply verification (§3.4): 4-check deterministic gate before
   auto-apply (source entries exist, diagnosis grounded, type-evidence
   match, no conflicting recent proposals).

5. Auto-rollback (§3.5): new adam-rollback.mjs reverts regressed proposals
   detected by A/B measurement, creates regression nudges.

6. Harness self-modification (§1 Table 1): new harness_edit proposal type
   targeting adam's own scripts with stricter gates (confidence≥5, never
   auto-apply, test-suite-gated).

7. Keypoint matrix evaluation (§4.2): 5 capability dimensions
   (tool_selection, scope_discipline, error_recovery, first_attempt,
   build_reliability) scored per batch for structured evaluation.

Test suite: 94 → 114 tests (20 new), all passing.

install.sh

@@ -126,7 +126,7 @@ copy_file "$SRC/adam/scripts/adam-archive.mjs"                       "$DEST/adam
 copy_file "$SRC/adam/scripts/adam-upgrade.mjs"                       "$DEST/adam/scripts/adam-upgrade.mjs"
 # v0.3.3 helper scripts — invoked from SKILL.md / hooks / analyst flow
 for _adam_script in adam-utils adam-window adam-explain adam-nudge-eligibility adam-cooldown \
-                    adam-score adam-ab-measure adam-apply-reinforcement; do
+                    adam-score adam-ab-measure adam-apply-reinforcement adam-batch adam-rollback; do
   copy_file "$SRC/adam/scripts/${_adam_script}.mjs" \
             "$DEST/adam/scripts/${_adam_script}.mjs"
   run "chmod +x \"$DEST/adam/scripts/${_adam_script}.mjs\""