What does this PR do?

This PR replaces the TracerTags []string field on the Process struct with the full TracerMetadata struct. This allows security events and CWS serializers to carry the complete tracer metadata (language, version, hostname, service name/env/version, process tags, etc.) instead of a pre-flattened list of tag strings.
Key changes:

• Process.TracerTags []string replaced by Process.TracerMetadata tracermetadata.TracerMetadata in the secl model (Unix + Windows).
• CWS serializer now emits the full TracerMetadata struct as "tracer" JSON instead of a flat map[string]string.
• Network event monitor iterates over TracerMetadata.Tags() directly instead of consuming pre-built tag slices.
• Process resolver stores the raw TracerMetadata on cache entries instead of converting to tags at resolution time.
• Deep copy codegen updated for the new struct on both Unix and Windows.

Motivation

Storing only flattened tags ([]string) on the Process struct discards structured tracer metadata (schema version, runtime ID, hostname, logs collection status, etc.) that downstream consumers need. By keeping the full TracerMetadata struct through the pipeline, we:

1. Preserve all tracer fields for CWS event serialization, giving backend consumers richer context.
2. Avoid redundant string splitting/joining — consumers that need key-value pairs can iterate via Tags() without re-parsing.
3. Make it possible for future consumers (e.g., workloadmeta, tagger) to access individual fields without string manipulation.

Describe how you validated your changes

• Unit tests in pkg/network/events/, pkg/security/tests/, and pkg/discovery/tracermetadata/ updated and passing.

Additional Notes

• The CWS event JSON schema (docs/cloud-workload-security/) has been updated to reflect the new tracer field structure (full struct instead of map[string]string).
• This is a breaking change for any downstream consumer parsing the "tracer" field in CWS events — it changes from {"key": "value", ...} to the full TracerMetadata JSON representation with named fields (tracer_language, service_name, etc.).