fix: status memory crash, per-tool counter, loud export failure without pyrage

[FZ2000]

Three bugs from the Forge audit report.

Fix 3 — status.py:49 crash when memory was synced (B1)

_data["memory"] is a flat dict {file_path, checksum, synced_at, ...}. The code iterated .values() treating it as a dict-of-dicts (like skills/linked_skills), then called .get("file_path") on strings — AttributeError on every status call after a memory sync.

# Before (crashes):
for info_dict in manifest._data.get("memory", {}).values():
    if fp := info_dict.get("file_path"):  # AttributeError: 'str'.get

# After (correct):
if fp := manifest._data.get("memory", {}).get("file_path"):
    recorded_paths.append(fp)

Fix 4 — sync_helpers.py per-tool success counter (B2)

total_copy/total_link accumulated across all tools in the loop, so the success message showed cumulative totals: "5 copied", "10 copied", "15 copied" for 3 tools × 5 skills. Now uses tool_copy/tool_link local variables for the message while still accumulating into the returned totals.

Fix 5 — export_import.py silent plaintext export when pyrage absent (B3)

Previously logged two warnings and continued exporting — secrets written in plaintext with no user acknowledgement. Now calls error() + raise SystemExit(1). The --no-secrets flag is the documented opt-out.

Updated test_export_import.py:

• test_export_creates_structure and test_export_writes_cache_data now pass --no-secrets (correct user flow when pyrage unavailable)
• Added test_export_fails_loudly_without_pyrage — asserts non-zero exit and no export dir created
• Added test_export_no_secrets_succeeds_without_pyrage — asserts --no-secrets still works

Tests

122 passing (120 original + 2 new).