feat(plan-01): Phase 3 — split domain OKR data into apps/okr/domain

Separate per-project domain data from the reusable harness so packages/casan-harness
holds no domain artifacts. Domain data physically relocated to apps/okr/domain, with
compat symlinks at the old paths (Python + app + evidence-log refs keep resolving).

Moved -> apps/okr/domain (+ compat symlink at old path):
  golden-runs/           (was .specify/level5/golden-runs)
  corpus/{redteam-corpus.jsonl,redteam-vectors.jsonl,benign-corpus/}
                         (was packages/casan-harness/security/*)
  traceability-map.json  (was .specify/traceability-map.json)
  input/                 (was docs/input — OKR requirement/architecture)

casan-paths.sh: add CASAN_DOMAIN_ROOT (apps/okr/domain; env-overridable so Plan-06 can
point a second app at its own domain; falls back to .specify pre-split).

Harness bash refs repointed to $CASAN_DOMAIN_ROOT: run-casan4 (golden), phase3-redteam
(corpus), phase-h4-multilingual/split-inject (benign-corpus), phase10-traceability (map),
benign-fp-report (corpus+vectors). Python + app refs still resolve via the compat
symlinks (repointed in Phase 4 when the symlinks are removed).

Full gate: PASS=64 FAIL=0 SKIP=3 (CASAN_CI_STEP_TIMEOUT_SEC=1200). A first gate run
crawled under host load avg ~30 (Ollama + system); re-run at lower load passed clean.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

AINative_OKR_CASAN5/packages/casan-harness/scripts/bash/benign-fp-report.sh

@@ -23,8 +23,8 @@ SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 source "$SCRIPT_DIR/casan-paths.sh"
 PROJECT_ROOT="$(cd "$SCRIPT_DIR/../../.." && pwd)"
 SEC_DIR="$CASAN_HARNESS_ROOT/security"
-CORPUS_DIR="$SEC_DIR/benign-corpus"
-VECTORS="$SEC_DIR/redteam-vectors.jsonl"
+CORPUS_DIR="$CASAN_DOMAIN_ROOT/corpus/benign-corpus"
+VECTORS="$CASAN_DOMAIN_ROOT/corpus/redteam-vectors.jsonl"
 
 GATE=1
 OUT_JSON="$PROJECT_ROOT/docs/output/casan/benign-fp-report.json"