CAMEL-23534: URL-decode schema properties in jackson-avro / jackson-protobuf

[cunningt]

Description

https://issues.apache.org/jira/browse/CAMEL-23534

Schema properties are URL-encoded when passed from Pipe to Kamelet via YamlRoutesBuilderLoader.createQueryString(), but were never decoded before reaching the schema resolvers. This caused parser errors when schemas contained special characters like quotes, equals signs, or brackets.

This fix adds URL decoding to:

• AvroSchemaResolver (Jackson and Jackson3)
• ProtobufSchemaResolver (Jackson and Jackson3)
• MimeType.of() method

Added comprehensive tests for each component to verify URL-encoded schemas are properly decoded and parsed.

Target

• [x ] I checked that the commit is targeting the correct branch (Camel 4 uses the main branch)

Tracking

• [x ] If this is a large change, bug fix, or code improvement, I checked there is a JIRA issue filed for the change (usually before you start working on it).

Apache Camel coding standards and style

• [x ] I checked that each commit in the pull request has a meaningful subject line and body.

• [x ] I have run mvn clean install -DskipTests locally from root folder and I have committed all auto-generated changes.

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[github-actions]

🧪 CI tested the following changed modules:

• components/camel-jackson-avro
• components/camel-jackson-protobuf
• components/camel-jackson3-avro
• components/camel-jackson3-protobuf
• components/camel-kamelet

All tested modules (15 modules)

• Camel :: JBang :: MCP
• Camel :: JBang :: Plugin :: Route Parser
• Camel :: JBang :: Plugin :: TUI
• Camel :: JBang :: Plugin :: Validate
• Camel :: Jackson 3 Avro
• Camel :: Jackson 3 Protobuf
• Camel :: Jackson Avro
• Camel :: Jackson Protobuf
• Camel :: Kamelet
• Camel :: Launcher :: Container
• Camel :: Test :: Main :: JUnit5
• Camel :: Test :: Main :: JUnit6
• Camel :: XML DSL with camel-xml-io
• Camel :: YAML DSL :: Validator
• Camel :: YAML DSL :: Validator Maven Plugin

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