Validate deterministic provider initialization order fix

[Copilot]

Validated the fix for non-deterministic provider initialization order in cmd/gomodel/main.go. The original code iterated directly over cfg.Providers map, causing providers to initialize in random order on each run.

Changes

• Provider names are now collected and sorted alphabetically before initialization
• Ensures consistent initialization order across runs for reproducibility and debugging

Implementation

// Before: non-deterministic map iteration
for name, pCfg := range cfg.Providers {
    p, err := providers.Create(pCfg)
    // ...
}

// After: deterministic sorted iteration
providerNames := make([]string, 0, len(cfg.Providers))
for name := range cfg.Providers {
    providerNames = append(providerNames, name)
}
sort.Strings(providerNames)

for _, name := range providerNames {
    pCfg := cfg.Providers[name]
    p, err := providers.Create(pCfg)
    // ...
}

Validation complete - all tests pass, code compiles successfully.

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