v0.2.0: drop cursor, add source_entries lifecycle, mandate memory frontmatter

Lifecycle redesign:
- Each proposal records source_entries: [<ts>...] in frontmatter listing
  the journal timestamps that fed its cluster.
- After apply/reject, skill calls adam/scripts/adam-archive.mjs which moves
  matching entries from journal.jsonl to journal/actioned-<id>.jsonl.
- Agent reads applied/ + rejected/ frontmatter on each /reflect, builds an
  excluded-timestamps set, skips any leftover already-actioned entries.
- cursor field in state.json is vestigial; agent ignores it.

Effect: journal stays bounded by active observations. Rule changes
re-evaluate the remainder without manual rewind. Race-safer for parallel
sessions on shared state.json (no cursor write contention).

Memory drafting:
- agents/adam.md adds 'Memory drafting protocol' parallel to Skill drafting.
- Memory proposals MUST contain auto-memory frontmatter (name, description,
  type, originSessionId) in '# Proposed change' body.
- Skill enforces frontmatter check at apply time; refuses if missing.

Tests: 18 -> 21. Two new tests for adam-archive happy path + no-op.

Migration: existing applied proposals lack source_entries. Their backing
journal entries archived as a one-time bulk migration; legacy proposals
annotated with migration note.

install.sh

@@ -24,6 +24,7 @@ mkdir -p \
   "$DEST/adam/rejected" \
   "$DEST/adam/trash" \
   "$DEST/adam/journal" \
+  "$DEST/adam/scripts" \
   "$DEST/adam/tests/fixtures"
 
 cp "$SRC/hooks/adam-observe.mjs"                                      "$DEST/hooks/"
@@ -31,6 +32,7 @@ cp "$SRC/hooks/adam-nudge.mjs"                                        "$DEST/hoo
 cp "$SRC/agents/adam.md"                                              "$DEST/agents/"
 cp "$SRC/skills/adam-self-improvement/SKILL.md"                       "$DEST/skills/adam-self-improvement/"
 cp "$SRC/commands/reflect.md"                                         "$DEST/commands/"
+cp "$SRC/adam/scripts/adam-archive.mjs"                               "$DEST/adam/scripts/"
 cp "$SRC/adam/tests/run-tests.sh"                                     "$DEST/adam/tests/"
 cp "$SRC/adam/tests/fixtures/seed-corrections.jsonl"                  "$DEST/adam/tests/fixtures/"
 
@@ -41,7 +43,7 @@ cp "$SRC/adam/tests/fixtures/seed-corrections.jsonl"                  "$DEST/ada
 echo "  files installed."
 echo
 echo "  next steps:"
-echo "    1. bash $DEST/adam/tests/run-tests.sh    # must show: 18 passed, 0 failed"
+echo "    1. bash $DEST/adam/tests/run-tests.sh    # must show: 21 passed, 0 failed"
 echo "    2. merge settings.json.example into $DEST/settings.json"
 echo "    3. start a fresh Claude Code session, then run /reflect"
 echo