refactor(semantics): migrate legacy @TIER to @COMPLEXITY annotations

- Replaced @TIER: TRIVIAL with @COMPLEXITY: 1
- Replaced @TIER: STANDARD with @COMPLEXITY: 3
- Replaced @TIER: CRITICAL with @COMPLEXITY: 5
- Manually elevated specific critical/complex components to levels 2 and 4
- Ignored legacy, specs, and node_modules directories
- Updated generated semantic map

backend/src/models/mapping.py

@@ -1,6 +1,6 @@
 # [DEF:backend.src.models.mapping:Module]
 #
-# @TIER:      STANDARD
+# @COMPLEXITY: 3
 # @SEMANTICS: database, mapping, environment, migration, sqlalchemy, sqlite
 # @PURPOSE:   Defines the database schema for environment metadata and database mappings using SQLAlchemy.
 # @LAYER:     Domain
@@ -20,7 +20,7 @@ import enum
 Base = declarative_base()
 
 # [DEF:ResourceType:Class]
-# @TIER: TRIVIAL
+# @COMPLEXITY: 1
 # @PURPOSE: Enumeration of possible Superset resource types for ID mapping.
 class ResourceType(str, enum.Enum):
     CHART = "chart"
@@ -30,7 +30,7 @@ class ResourceType(str, enum.Enum):
 
 
 # [DEF:MigrationStatus:Class]
-# @TIER: TRIVIAL
+# @COMPLEXITY: 1
 # @PURPOSE: Enumeration of possible migration job statuses.
 class MigrationStatus(enum.Enum):
     PENDING = "PENDING"
@@ -41,7 +41,7 @@ class MigrationStatus(enum.Enum):
 # [/DEF:MigrationStatus:Class]
 
 # [DEF:Environment:Class]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @PURPOSE: Represents a Superset instance environment.
 class Environment(Base):
     __tablename__ = "environments"
@@ -53,7 +53,7 @@ class Environment(Base):
 # [/DEF:Environment:Class]
 
 # [DEF:DatabaseMapping:Class]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @PURPOSE: Represents a mapping between source and target databases.
 class DatabaseMapping(Base):
     __tablename__ = "database_mappings"
@@ -69,7 +69,7 @@ class DatabaseMapping(Base):
 # [/DEF:DatabaseMapping:Class]
 
 # [DEF:MigrationJob:Class]
-# @TIER: TRIVIAL
+# @COMPLEXITY: 2
 # @PURPOSE: Represents a single migration execution job.
 class MigrationJob(Base):
     __tablename__ = "migration_jobs"
@@ -83,7 +83,7 @@ class MigrationJob(Base):
 # [/DEF:MigrationJob:Class]
 
 # [DEF:ResourceMapping:Class]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @PURPOSE: Maps a universal UUID for a resource to its actual ID on a specific environment.
 # @TEST_DATA: resource_mapping_record -> {'environment_id': 'prod-env-1', 'resource_type': 'chart', 'uuid': '123e4567-e89b-12d3-a456-426614174000', 'remote_integer_id': '42'}
 class ResourceMapping(Base):