Clean semantic log identity and improve text output

[VolkerChristian]

Motivation

• Remove duplicated connection/instance identity prefixes from semantic log message text where the logger scope already supplies inst=/conn= identity.
• Keep changes focused on Phase 1 (identity cleanup) to avoid the scope creep experienced in prior work, and defer Phase 2 (text formatting & coloring) until identity cleanup is fully scoped and tested.
• Provide an automated, honest source-policy test to catch future regressions where identity prefixes are prepended to messages emitted from object-scoped semantic loggers.

Description

• Removed duplicated identity prefixes from HTTP socket contexts so frameworkLog() messages no longer prepend getSocketConnection()->getConnectionName() and now log the human message text only; changes are in src/web/http/client/SocketContext.cpp and src/web/http/server/SocketContext.cpp.
• Removed duplicated instance prefixes and duplicated {} format arguments from TLS acceptor/connector and connection shutdown messages so object-scoped this->log() / SocketConnection::log() messages do not pass config->getInstanceName() / Super::getConnectionName() as leading message text; changes are in src/core/socket/stream/tls/SocketAcceptor.hpp, src/core/socket/stream/tls/SocketConnector.hpp, and src/core/socket/stream/tls/SocketConnection.hpp.
• Added a focused source-policy unit test SemanticIdentityMessagePolicyTest under tests/unit/log/SemanticIdentityMessagePolicyTest.cpp and registered it in the log test CMakeLists.txt to detect obvious duplicated identity prefixes on known object-scoped semantic logger surfaces.
• Added docs/logging/semantic-identity-message-cleanup-report.md that records the searches performed, files audited, files changed, prefixes removed, intentionally retained occurrences, and follow-up notes about static helper logs.

Testing

• Configured and built with tests and apps enabled using cmake -S . -B cmake-build -DSNODEC_BUILD_TESTS=ON -DSNODEC_BUILD_APPS=ON and cmake --build cmake-build --parallel 2.
• Ran targeted unit tests with ctest --test-dir cmake-build -R "SemanticIdentityMessagePolicyTest|Log|Semantic|Logger" --output-on-failure and then the full test set with ctest --test-dir cmake-build --output-on-failure, both completed successfully for the tests that ran in this environment.
• The new SemanticIdentityMessagePolicyTest passed; the full CTest run reported many repository-gated component tests as Skipped per existing test gating but overall the executed tests passed.
• Verified git diff --check (no whitespace/check failures) and formatted touched files with clang-format where appropriate.

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Codex Task