feat(P1-002): migrate offline JSONL import/export to dedicated CLI

- Replace the MCP import_messages tool with standalone CLI commands:
  	iny-convmem-mcp --data-dir <path> --import <file>
  	iny-convmem-mcp --data-dir <path> --export <file>
- Add src/cli/{import,export,cli.h} and a CTest process test (tiny-convmem-mcp.cli)
  covering round-trip, manifest generation, overwrite/reject policies, and
  include_deleted export.
- Fix Debug heap corruption in 	iny_store_import() by deep-copying imported
  messages instead of taking ownership of caller-allocated records, which were
  later freed by the caller.
- Remove the now-redundant src/mcp/tools/import_messages.c and keep the tool
  registry at 7 MCP tools.
- Update docs/development-plan.md (P1-002 complete) and
  docs/implementation-status.md with CLI test coverage.

1 files changed, 21 insertions, 0 deletions

diff --git a/src/cli/cli.h b/src/cli/cli.h
new file mode 100644
index 0000000..1b173b4
--- /dev/null
+++ b/src/cli/cli.h
@@ -0,0 +1,21 @@
+#ifndef TINY_CONVMEM_CLI_H
+#define TINY_CONVMEM_CLI_H
+
+#include "storage/store.h"
+
+#define TINY_CLI_LINE_MAX (TINY_CONTENT_MAX + 4096U)
+
+typedef struct tiny_cli_options
+{
+  const char *data_dir;
+  const char *import_path;
+  const char *export_path;
+  const char *session_id;
+  const char *policy_name;
+  int include_deleted;
+} tiny_cli_options_t;
+
+int tiny_cli_import(tiny_store_t *store, const tiny_cli_options_t *options);
+int tiny_cli_export(tiny_store_t *store, const tiny_cli_options_t *options);
+
+#endif