feat: add pricing sync script and update model prices from OpenRouter (#27)

* fix: pin npm package versions in MCP integration templates

Prevent supply chain attacks by pinning exact versions instead of
using unpinned `npx -y @package` which pulls latest on every run.

23 of 25 integrations pinned. sqlite-mcp and aws skipped (packages
not found on npm registry).

* fix: use stable azure/mcp version instead of beta

* feat: add pricing sync script and update model prices from OpenRouter API

- scripts/sync-pricing.py fetches real-time pricing from OpenRouter
- Updated 64 price fields across 13 provider files
- Run periodically or in CI to keep prices current

providers/gemini.toml

@@ -15,8 +15,8 @@ display_name = "Gemini 3.1 Pro Preview"
 tier = "frontier"
 context_window = 1048576
 max_output_tokens = 65536
-input_cost_per_m = 2.50
-output_cost_per_m = 15.0
+input_cost_per_m = 2.0
+output_cost_per_m = 12.0
 supports_tools = true
 supports_vision = true
 supports_streaming = true
@@ -28,8 +28,8 @@ display_name = "Gemini 3 Flash Preview"
 tier = "smart"
 context_window = 1048576
 max_output_tokens = 65536
-input_cost_per_m = 0.15
-output_cost_per_m = 0.60
+input_cost_per_m = 0.5
+output_cost_per_m = 3.0
 supports_tools = true
 supports_vision = true
 supports_streaming = true
@@ -41,8 +41,8 @@ display_name = "Gemini 3.1 Flash Lite Preview"
 tier = "fast"
 context_window = 1048576
 max_output_tokens = 8192
-input_cost_per_m = 0.04
-output_cost_per_m = 0.15
+input_cost_per_m = 0.25
+output_cost_per_m = 1.5
 supports_tools = true
 supports_vision = true
 supports_streaming = true
@@ -54,8 +54,8 @@ display_name = "Gemini 2.5 Flash Lite"
 tier = "fast"
 context_window = 1048576
 max_output_tokens = 8192
-input_cost_per_m = 0.04
-output_cost_per_m = 0.15
+input_cost_per_m = 0.09999999999999999
+output_cost_per_m = 0.39999999999999997
 supports_tools = true
 supports_vision = true
 supports_streaming = true
@@ -80,8 +80,8 @@ display_name = "Gemini 2.5 Flash"
 tier = "smart"
 context_window = 1048576
 max_output_tokens = 65536
-input_cost_per_m = 0.15
-output_cost_per_m = 0.60
+input_cost_per_m = 0.3
+output_cost_per_m = 2.5
 supports_tools = true
 supports_vision = true
 supports_streaming = true
@@ -93,8 +93,8 @@ display_name = "Gemini 2.0 Flash"
 tier = "fast"
 context_window = 1048576
 max_output_tokens = 8192
-input_cost_per_m = 0.10
-output_cost_per_m = 0.40
+input_cost_per_m = 0.075
+output_cost_per_m = 0.3
 supports_tools = true
 supports_vision = true
 supports_streaming = true