The indexer's storage location was the `home` field of IndexerConfig, used only to derive the RocksDB dir. Defaulting to "." meant it landed in the process CWD — fine for the standalone service, but wrong when the indexer runs embedded in a logos_host subprocess (RocksDB ended up in an arbitrary/unwritable dir). Storage location is an operational concern the host should own, not something baked into a user-editable config.
Remove `home` from IndexerConfig and pass the storage directory explicitly:
- core: `IndexerCore::new(config, storage_dir)` derives `<storage_dir>/rocksdb`.
- ffi: `start_indexer(runtime, config_path, storage_dir)`; null/empty storage_dir falls back to ".". Lets a host (e.g. a Logos module's instance persistence path) own where state lives.
- service: `run_server(config, storage_dir, port)` + a `--data-dir` flag (default ".") on the binary, preserving current behaviour.
- drop `home` from the committed indexer config JSONs and the test fixtures.
BREAKING CHANGE: `start_indexer` gains a `storage_dir` parameter and IndexerConfig no longer has a `home` field.
BREAKING CHANGE:
- Crate `nssa` renamed to `lee`; update `Cargo.toml` dependencies from `nssa = { workspace = true }` to `lee = { workspace = true }`.
- Crate `nssa_core` renamed to `lee_core`; update similarly.
- Crate `key_protocol` moved under `lee`; update `Cargo.toml` dependencies from `key_protocol = { workspace = true }` to `lee_key_protocol = { workspace = true }`.
- Type `NSSATransaction` (in `common`) renamed to `LeeTransaction`.
- Error type `nssa::error::NssaError` renamed to `lee::error::LeeError`.
- Error type `nssa_core::error::NssaCoreError` renamed to `lee_core::error::LeeCoreError`.
- All `use nssa::` and `use nssa_core::` import paths must be updated to `use lee::` and `use lee_core::` respectively.
- Guest programs must replace `write_nssa_outputs` with `write_lee_outputs`.
- The sequencer RocksDB column family for the chain state was renamed. Existing databases are incompatible and must be wiped before running the new version.
- Domain separators updated: `"NSSA_seed"` → `"LEE_seed"` (key derivation), `"NSSA/v0.2/KDF-SHA256/"` → `"LEE/v0.2/KDF-SHA256/"` (encryption KDF), `"/NSSA/v0.2/AccountId/PDA/"` →
`"/LEE/v0.2/AccountId/PDA/"` (public PDA address derivation). All previously derived keys, encrypted outputs, and public PDA addresses are invalidated.
