feat: postgres hooks

package/db-tool/default.nix

@@ -1,4 +1,4 @@
-{ dash, hectic, postgresql_17, neovim, openssh, coreutils, gawk, lib, runCommand }:
+{ dash, hectic, postgresql_17, neovim, openssh, coreutils, gawk, lib, runCommand, self }:
 let
   shell = "${dash}/bin/dash";
 
@@ -9,6 +9,23 @@ let
     cp ${hecticInheritanceSqlPath} "$out/share/hectic/hectic-inheritance.sql"
   '';
 
+  # Materialize the templated version SQL into the Nix store as a real file
+  # so it can be passed by path to psql -f (alongside the static siblings).
+  hecticVersionSqlFile = pkgs-writeText "hectic-version.sql" self.lib.hectic.version.sql;
+  pkgs-writeText = name: text: runCommand name { inherit text; passAsFile = [ "text" ]; } ''
+    cp "$textPath" "$out"
+  '';
+
+  hecticEnv = ''
+    HECTIC_VERSION_SQL=${hecticVersionSqlFile}
+    HECTIC_SECRET_SQL=${self.lib.hectic.secret.path}
+    HECTIC_MIGRATION_SQL=${self.lib.hectic.migration.path}
+    HECTIC_INHERITANCE_SQL=${self.lib.hectic.inheritance.path}
+    export HECTIC_VERSION_SQL HECTIC_SECRET_SQL HECTIC_MIGRATION_SQL HECTIC_INHERITANCE_SQL
+  '';
+
+  applyBundle = builtins.readFile self.lib.hectic.applyBundleScript;
+
   mkDatabase =
     { postgresql ? postgresql_17 }:
     hectic.writeShellApplication {
@@ -17,7 +34,6 @@ let
         "errexit"
         "nounset"
       ];
-      # SC2209: false positive — PAGER_OR_CAT=cat stores the string "cat" intentionally
       excludeShellChecks = [ "SC2209" ];
       name = "database";
       runtimeInputs = [ hectic.migrator hectic.parse-uri postgresql neovim openssh coreutils gawk ];
@@ -27,6 +43,8 @@ let
         ${builtins.readFile hectic.helpers.posix-shell.change_namespace}
         ${builtins.readFile hectic.helpers.posix-shell.quote}
         ${builtins.readFile hectic.helpers.posix-shell.pager_or_cat}
+        ${hecticEnv}
+        ${applyBundle}
         ${builtins.readFile ./database.sh}
       '';
 
@@ -44,11 +62,7 @@ let
       name = "postgres-init";
       runtimeInputs = [ postgresql coreutils ];
 
-      text = ''
-        HECTIC_INHERITANCE_SQL_DEFAULT="${hecticInheritance}/share/hectic/hectic-inheritance.sql"
-        export HECTIC_INHERITANCE_SQL_DEFAULT
-        ${builtins.readFile ./postgres-init.sh}
-      '';
+      text = builtins.readFile ./postgres-init.sh;
 
       meta = {
         description = "Initialize local PostgreSQL instance";