Remove symfony/ai-agent dependency from platform bridges

According to deptrac.yaml, platform bridges should not depend on the
Agent component. Only the Perplexity bridge requires this dependency
for SearchResultProcessor which implements OutputProcessorInterface.

Author: OskarStark

src/platform/src/Bridge/Anthropic/composer.json

@@ -26,7 +26,6 @@
     ],
     "require": {
         "php": ">=8.2",
-        "symfony/ai-agent": "@dev",
         "symfony/ai-platform": "@dev",
         "symfony/http-client": "^7.3|^8.0"
     },

src/platform/src/Bridge/DeepSeek/composer.json

@@ -25,7 +25,6 @@
     ],
     "require": {
         "php": ">=8.2",
-        "symfony/ai-agent": "@dev",
         "symfony/ai-platform": "@dev",
         "symfony/http-client": "^7.3|^8.0"
     },

src/platform/src/Bridge/Gemini/composer.json

@@ -26,7 +26,6 @@
     ],
     "require": {
         "php": ">=8.2",
-        "symfony/ai-agent": "@dev",
         "symfony/ai-platform": "@dev",
         "symfony/http-client": "^7.3|^8.0"
     },

src/platform/src/Bridge/Mistral/composer.json

@@ -25,7 +25,6 @@
     ],
     "require": {
         "php": ">=8.2",
-        "symfony/ai-agent": "@dev",
         "symfony/ai-platform": "@dev",
         "symfony/http-client": "^7.3|^8.0"
     },

src/platform/src/Bridge/OpenAi/composer.json

@@ -31,7 +31,6 @@
     ],
     "require": {
         "php": ">=8.2",
-        "symfony/ai-agent": "@dev",
         "symfony/ai-platform": "@dev",
         "symfony/http-client": "^7.3|^8.0"
     },

src/platform/src/Bridge/VertexAi/composer.json

@@ -27,7 +27,6 @@
     "require": {
         "google/auth": "^1.47",
         "php": ">=8.2",
-        "symfony/ai-agent": "@dev",
         "symfony/ai-gemini-platform": "@dev",
         "symfony/ai-platform": "@dev",
         "symfony/http-client": "^7.3|^8.0"