Compile the direct-P2P test-only machinery out of production builds
(YAMS_DAEMON_TEST_HOOKS_ENABLED now wraps the reconnect-loop hook storage,
invoker, and call site, matching the already-guarded setter). Replace the
single shared writer key in p2p_manager tests with one distinct key pair per
writer identity so origin-binding regressions (a record claiming origin X but
signed by Y's key) fail verification. Extract the copy-pasted bytes/text/TempDir
helpers into tests/common/p2p_test_helpers.h and reuse them across the
transport/delta/manager suites. Replace a timing-sensitive fixed sleep in the
transport session-expiry test with a bounded poll that accepts both deadline
manifestations, and gate the memory-sync-service concurrent-lifecycle stress
case behind YAMS_RUN_STRESS_TESTS=1 per the existing FTS5 pattern. Deduplicate
the byte-identical commitment-JSON serialization inside MemorySyncLoop
(coldBootstrapRoot / persistReplicationCheckpoint) into one static helper.
Signed-off-by: trvon <git@trevon.dev>
