feat: add remaining ADO.Net connection string synonyms

[dlevy-msft-sql]

Context

Issue #288 requested adding ADO.Net synonyms to connection string parameters. PR #368 addresses the minimum ask (authentication synonym + spaced auth value names), but the broader set of ADO.Net SqlClient synonyms remain unsupported.

Current State

The adoSynonyms map in msdsn/conn_str.go currently has:

Synonym	Maps to
application name	app name
data source, address, network address, addr	server
user, uid	user id
pwd	password
initial catalog	database
column encryption setting	columnencryption
authentication (PR #368)	fedauth

Missing ADO.Net Synonyms

These are common ADO.Net SqlClient connection string keywords that users migrating from .NET would expect to work:

ADO.Net Keyword	Should map to (driver key)
connect timeout	connection timeout
integrated security / trusted_connection	integrated auth flag (needs design)
failover partner (spaced)	failoverpartner
application intent (spaced)	applicationintent
trust server certificate (spaced)	trustservercertificate
multi subnet failover (spaced)	multisubnetfailover
hostname in certificate (spaced)	hostnameincertificate
current language	TBD (if supported)
wsid	workstation id

Some of these are simple spelling/spacing variants of existing keys. Others (like integrated security / trusted_connection) may need additional design since they map to a boolean concept rather than a direct key.

References

• Parent issue: Add more ADO.Net synonyms to connection string parameters #288
• Auth synonym PR: feat: add ADO.Net Authentication connection string synonym and spaced value names #368
• ADO.Net SqlClient connection string keywords