fix(mcp): return resource read results for resources

[ousamabenyounes]

Fixes #8428.

What changed

• Return ReadResourceResult for McpResource operations handled by StructuredContentProcessor.
• Preserve the existing CallToolResult path for MCP tools.
• Add a unit regression test that asserts resource reads expose contents via TextResourceContents.
• Align the root and split-package mcp/sdk constraints with symfony/mcp-bundle dev-main, which now requires mcp/sdk ^0.7.

RED

docker run --rm --label com.ora.cleanup.scope=contribute -v "$PWD":/app -w /app composer:2.9.8 sh -lc 'composer update symfony/mcp-bundle --dry-run'

Your requirements could not be resolved to an installable set of packages.
Root composer.json requires mcp/sdk ^0.6 ... package is fixed to v0.7.0 (lock file version) by a partial update and that version does not match.

Original behavior RED:

docker run --rm --label com.ora.cleanup.scope=contribute -v "$PWD":/app -w /app php:8.4-cli vendor/bin/phpunit src/Mcp/Tests/State/StructuredContentProcessorTest.php --filter testMcpResourceReturnsReadResourceResult

Failed asserting that an instance of class Mcp\Schema\Result\CallToolResult is an instance of class Mcp\Schema\Result\ReadResourceResult.
Tests: 1, Assertions: 1, Failures: 1.

GREEN

./run-ci.sh

composer update symfony/mcp-bundle mcp/sdk --dry-run: OK
composer install --no-progress: OK
vendor/bin/phpunit src/Mcp/Tests/State/StructuredContentProcessorTest.php --filter testMcpResourceReturnsReadResourceResult: Tests: 1, Assertions: 5, PHPUnit Notices: 1
php-cs-fixer dry-run on touched files: Found 0 of 4 files that can be fixed.

[ousamabenyounes]

Pushed 4ea680245 to fix the CI dependency-resolution failure.

The CI logs were failing before tests because symfony/mcp-bundle dev-main now requires mcp/sdk ^0.7 while this branch still required ^0.6. I aligned the root and src/Mcp package constraints with the lock file.

Validation: reproduced the Composer conflict locally (RED), then reran ./run-ci.sh (Composer dry-run, install, MCP regression test, and CS fixer dry-run) successfully.

[ousamabenyounes]

Pushed an additional CI fix in 6c18dc3.\n\nWhat changed:\n- Laravel provider now passes the new Symfony MCP bundle MiddlewareFactory argument required by the current McpController constructor.\n- Removed obsolete SerializerPropertyMetadataFactory is_array() guards that PHPStan reported as always true after the typed helper return.\n\nLocal validation:\n- Laravel package build + tests: 220 passed / 673 assertions.\n- PHPStan targeted check on src/Metadata/Property/Factory/SerializerPropertyMetadataFactory.php: no errors.\n- PHP CS Fixer dry-run on both touched files: 0 fixable files.

[ousamabenyounes]

Follow-up on the remaining red checks after 6c18dc3:

• The original MCP dependency/Laravel/PHPStan failures are green now.
• PHPUnit (PHP 8.5) (Elasticsearch 8.4.0) failed before tests while resolving docker:latest from Docker Hub (i/o timeout).
• The remaining lowest failures for doctrine-orm, doctrine-odm, and json-api match the latest failing main CI run 29720752858, so they look like upstream baseline failures rather than this PR.

I tried to rerun the failed workflow, but GitHub returned run ... cannot be rerun; its workflow file may be broken while the run was still settling.