Update manifest.json and infra README

- Updated timestamps and AST hashes in manifest.json for various backend and frontend files to reflect recent changes.
- Added new files related to MCC categories and optional hold reasons in the manifest.
- Modified the README in the infra directory to correct the linting tool from 'mypy' to 'ty' for type checking in the backend project.

backend/app/categorization/models.py

@@ -100,6 +100,34 @@ class MccCode(Base):
     dictionary_version: Mapped[int] = mapped_column(nullable=False, default=1)
 
 
+class CategoryMcc(Base, PkMixin):
+    """Space-scoped MCC codes of a category: many codes per category, but every
+    code maps to at most one category inside the space."""
+
+    __tablename__ = "category_mcc_codes"
+    __table_args__ = (
+        UniqueConstraint("space_id", "mcc_code", name="uq_category_mcc_space_code"),
+        ForeignKeyConstraint(
+            ["space_id", "category_id"],
+            ["categories.space_id", "categories.id"],
+            ondelete="CASCADE",
+            name="fk_category_mcc_category_tenant",
+        ),
+        ForeignKeyConstraint(
+            ["mcc_code"],
+            ["mcc_codes.code"],
+            ondelete="RESTRICT",
+            name="fk_category_mcc_dictionary",
+        ),
+    )
+
+    space_id: Mapped[uuid.UUID] = mapped_column(
+        Uuid, ForeignKey("financial_spaces.id", ondelete="CASCADE"), nullable=False, index=True
+    )
+    category_id: Mapped[uuid.UUID] = mapped_column(Uuid, nullable=False, index=True)
+    mcc_code: Mapped[int] = mapped_column(Integer, nullable=False)
+
+
 class BankCategoryMapping(Base, PkMixin):
     """Maps a bank's raw category string to an MCC for suggestion purposes."""