feat(security): integrate security hooks for access control

* Add security hooks for per-entity operation rules and row/column-level security.
* Implement annotation tool for storing and retrieving freeform annotations.
* Enhance handler to support model registration with access rules.

pkg/resolvemcp/security_hooks.go

@@ -0,0 +1,115 @@
+package resolvemcp
+
+import (
+	"context"
+	"net/http"
+
+	"github.com/bitechdev/ResolveSpec/pkg/common"
+	"github.com/bitechdev/ResolveSpec/pkg/logger"
+	"github.com/bitechdev/ResolveSpec/pkg/security"
+)
+
+// RegisterSecurityHooks wires the security package's access-control layer into the
+// resolvemcp handler. Call it once after creating the handler, before registering models.
+//
+// The following controls are applied:
+//   - Per-entity operation rules (CanRead, CanCreate, CanUpdate, CanDelete, CanPublic*)
+//     stored via RegisterModelWithRules / SetModelRules.
+//   - Row-level security: WHERE clause injected per user from the SecurityList provider.
+//   - Column-level security: sensitive columns masked/hidden in read results.
+//   - Audit logging after each read.
+func RegisterSecurityHooks(handler *Handler, securityList *security.SecurityList) {
+	// BeforeHandle: enforce model-level operation rules (auth check).
+	handler.Hooks().Register(BeforeHandle, func(hookCtx *HookContext) error {
+		if err := security.CheckModelAuthAllowed(newSecurityContext(hookCtx), hookCtx.Operation); err != nil {
+			hookCtx.Abort = true
+			hookCtx.AbortMessage = err.Error()
+			hookCtx.AbortCode = http.StatusUnauthorized
+			return err
+		}
+		return nil
+	})
+
+	// BeforeRead (1st): load RLS + CLS rules from the provider into SecurityList.
+	handler.Hooks().Register(BeforeRead, func(hookCtx *HookContext) error {
+		return security.LoadSecurityRules(newSecurityContext(hookCtx), securityList)
+	})
+
+	// BeforeRead (2nd): apply row-level security — injects a WHERE clause into the query.
+	// resolvemcp has no separate BeforeScan hook; the query is available in BeforeRead.
+	handler.Hooks().Register(BeforeRead, func(hookCtx *HookContext) error {
+		return security.ApplyRowSecurity(newSecurityContext(hookCtx), securityList)
+	})
+
+	// AfterRead (1st): apply column-level security — mask/hide columns in the result.
+	handler.Hooks().Register(AfterRead, func(hookCtx *HookContext) error {
+		return security.ApplyColumnSecurity(newSecurityContext(hookCtx), securityList)
+	})
+
+	// AfterRead (2nd): audit log.
+	handler.Hooks().Register(AfterRead, func(hookCtx *HookContext) error {
+		return security.LogDataAccess(newSecurityContext(hookCtx))
+	})
+
+	// BeforeUpdate: enforce CanUpdate rule.
+	handler.Hooks().Register(BeforeUpdate, func(hookCtx *HookContext) error {
+		return security.CheckModelUpdateAllowed(newSecurityContext(hookCtx))
+	})
+
+	// BeforeDelete: enforce CanDelete rule.
+	handler.Hooks().Register(BeforeDelete, func(hookCtx *HookContext) error {
+		return security.CheckModelDeleteAllowed(newSecurityContext(hookCtx))
+	})
+
+	logger.Info("Security hooks registered for resolvemcp handler")
+}
+
+// --------------------------------------------------------------------------
+// securityContext — adapts resolvemcp.HookContext to security.SecurityContext
+// --------------------------------------------------------------------------
+
+type securityContext struct {
+	ctx *HookContext
+}
+
+func newSecurityContext(ctx *HookContext) security.SecurityContext {
+	return &securityContext{ctx: ctx}
+}
+
+func (s *securityContext) GetContext() context.Context {
+	return s.ctx.Context
+}
+
+func (s *securityContext) GetUserID() (int, bool) {
+	return security.GetUserID(s.ctx.Context)
+}
+
+func (s *securityContext) GetSchema() string {
+	return s.ctx.Schema
+}
+
+func (s *securityContext) GetEntity() string {
+	return s.ctx.Entity
+}
+
+func (s *securityContext) GetModel() interface{} {
+	return s.ctx.Model
+}
+
+func (s *securityContext) GetQuery() interface{} {
+	return s.ctx.Query
+}
+
+func (s *securityContext) SetQuery(query interface{}) {
+	if q, ok := query.(common.SelectQuery); ok {
+		s.ctx.Query = q
+	}
+}
+
+func (s *securityContext) GetResult() interface{} {
+	return s.ctx.Result
+}
+
+func (s *securityContext) SetResult(result interface{}) {
+	s.ctx.Result = result
+}