fix: normalize key-load exceptions; type-faithful decrypt_data (v0.1.3)

- encrypted OpenSSH private key with no password now raises ValueError (not a raw
  TypeError from load_ssh_private_key), matching the PEM path and the docstring (L14)
- a non-PEM/non-SSH public key raises a clear ValueError instead of cryptography's
  UnsupportedAlgorithm, consistent with the private-key paths (L15)
- decrypt_data only treats a json-OBJECT plaintext as a dict, so json-shaped strings
  ('123','true','[1,2]') round-trip as strings; existing dict blobs unaffected (L16)
- both key loads route through shared _load_private_key/_load_public_key helpers
- document reencrypt's fail-loud (vs decrypt_record's per-field swallow) asymmetry (nit).

Signed-off-by: disqualifier <dev@disqualifier.me>

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "envelope_crypto"
-version = "0.1.2"
+version = "0.1.3"
 description = "Envelope encryption (RSA-OAEP wrapped AES-256-GCM) for dict records — config-free, storage-agnostic, installable."
 requires-python = ">=3.10"
 dependencies = [