Add CookiePatternFilter to push adoption filtering to SQL

The adoptUncategorisedPatterns method loaded all patterns for a
banner then filtered in Go. This adds a CookiePatternFilter
(match_type + cookie_category_id) and wires it into
LoadAllByCookieBannerID so the two targeted loads only fetch
the rows they need.

Signed-off-by: Émile Ré <emile@getprobo.com>

pkg/coredata/cookie_pattern.go

@@ -331,6 +331,7 @@ func (cps *CookiePatterns) LoadAllByCookieBannerID(
 	conn pg.Querier,
 	scope Scoper,
 	cookieBannerID gid.GID,
+	filter *CookiePatternFilter,
 ) error {
 	q := `
 SELECT
@@ -351,14 +352,16 @@ FROM
 WHERE
 	%s
 	AND cookie_banner_id = @cookie_banner_id
+	AND %s
 ORDER BY
 	created_at ASC, id ASC;
 `
 
-	q = fmt.Sprintf(q, scope.SQLFragment())
+	q = fmt.Sprintf(q, scope.SQLFragment(), filter.SQLFragment())
 
 	args := pgx.StrictNamedArgs{"cookie_banner_id": cookieBannerID}
 	maps.Copy(args, scope.SQLArguments())
+	maps.Copy(args, filter.SQLArguments())
 
 	rows, err := conn.Query(ctx, q, args)
 	if err != nil {

pkg/coredata/cookie_pattern_filter.go

@@ -0,0 +1,83 @@
+// Copyright (c) 2026 Probo Inc <hello@getprobo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+package coredata
+
+import (
+	"github.com/jackc/pgx/v5"
+	"go.probo.inc/probo/pkg/gid"
+)
+
+type CookiePatternFilter struct {
+	matchType        *CookiePatternMatchType
+	cookieCategoryID *gid.GID
+}
+
+func NewCookiePatternFilter(
+	matchType *CookiePatternMatchType,
+	cookieCategoryID *gid.GID,
+) *CookiePatternFilter {
+	return &CookiePatternFilter{
+		matchType:        matchType,
+		cookieCategoryID: cookieCategoryID,
+	}
+}
+
+func (f *CookiePatternFilter) SQLFragment() string {
+	if f == nil {
+		return "TRUE"
+	}
+
+	return `
+(
+	CASE
+		WHEN @has_match_type_filter::boolean = false THEN TRUE
+		WHEN @has_match_type_filter::boolean = true THEN
+			match_type = @filter_match_type::cookie_pattern_match_type
+		ELSE TRUE
+	END
+	AND
+	CASE
+		WHEN @has_cookie_category_id_filter::boolean = false THEN TRUE
+		WHEN @has_cookie_category_id_filter::boolean = true THEN
+			cookie_category_id = @filter_cookie_category_id::text
+		ELSE TRUE
+	END
+)`
+}
+
+func (f *CookiePatternFilter) SQLArguments() pgx.StrictNamedArgs {
+	if f == nil {
+		return pgx.StrictNamedArgs{}
+	}
+
+	args := pgx.StrictNamedArgs{
+		"has_match_type_filter":         false,
+		"filter_match_type":             nil,
+		"has_cookie_category_id_filter": false,
+		"filter_cookie_category_id":     nil,
+	}
+
+	if f.matchType != nil {
+		args["has_match_type_filter"] = true
+		args["filter_match_type"] = string(*f.matchType)
+	}
+
+	if f.cookieCategoryID != nil {
+		args["has_cookie_category_id_filter"] = true
+		args["filter_cookie_category_id"] = *f.cookieCategoryID
+	}
+
+	return args
+}