Release steampipe-postgres-fdw v2.2.0

[pskrbasu]

Summary

• Add support for propagation of OpenTelemetry context from clients (feat: support propagation of OpenTelemetry context from clients #568, feat: support propagation of OpenTelemetry context from clients with SQLcommenter #569)
• Update Go version to 1.26 (Update Go version to 1.26 #637)
• Fix OpenTelemetry metric names to only contain valid characters (fix: OpenTelemetry metric names must only contain [A-Za-z0-9_.-] #595)
• Bump go-git/v5 from 5.16.2 to 5.16.5
• Update Darwin x86_64 build runner from macos-13 to macos-15-intel (Update Darwin x86_64 build runner from macos-13 to macos-15-intel #634)
• Fix memory leaks caused by unfreed CString allocations (Fix memory leak: free CString allocations in explain.go Property() #618, Fix memory leak: use pstrdup for CString in schema.go SchemaToSql() #620, Fix memory leak: free CString in helpers.go valToBuffer() hot path #622, Fix incorrect log message and document nested defer pattern in fdw.go #624, Fix memory leak: free CString in helpers.go ValToDatum() initialization #631)

Test plan

• Verify all CI checks pass
• Tag v2.2.0 and verify Build Draft Release workflow completes successfully
• Verify all four platform builds (Darwin x86_64, Darwin ARM64, Linux x86_64, Linux ARM64)
• Publish FDW image via Publish FDW Image workflow

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