Native to_json_list walks untagged rows again, and json_native returns RID objects json.dumps refuses #219

Problem

Two things in the native NativeResultSet.to_json_list (src/arcadedb/_native/database.py) and json_native (src/arcadedb/_native/codec.py).

1. A second walk over rows that cannot change. to_json_list drains the decoded rows and then runs json_native over every value of every row. codec.loads already skips its per-object hook when the reply text holds no escaped tag (_TAG_ESCAPED not in text), and json.loads alone returns only str, int, float, bool, None, list and dict, which json_native returns unchanged. For a result in which no reply carried a tagged value the walk is pure overhead.

The numbers below are from a probe on the laptop, native wheel 26.11.1.dev0, cores 8 to 15, one process, untimed (orientation only, not an A/B; the timed A/B is separate). Medians over repetitions, paper-shaped results from a 10,000-vertex fixture. Every reply was untagged, and to_list, to_json_list and the identity-patched to_json_list returned equal rows.

The walk is 51% to 95% of the to_json_list wall on the shapes up to 100 rows (the statement is not in this table; the walk is 0.0% to 5.7% of statement plus drain plus walk on the shapes up to 100 rows, so for the engine-bound reads the saving is small and for a short indexed read it is a few percent). Larger results pay it in proportion to rows (1.03 to 1.06 us per row of 4 columns on the 100 to 10,000 row scans).

2. json_native returns values json.dumps refuses. to_json_list is the method that promises JSON-native rows, and the JVM wheel returns the RID text ("#1:0") for a link, in a column, in a list and inside a map (checked 2026-11-04 on the 26.11.1.dev0 JVM and native wheels with a LINK property, a list of links, SELECT @rid, and a map value). The native wheel returns the RID object. The probe's unit cases on json_native (FINDING lines):

A map whose keys are not strings also keeps its keys on native (a MAP property with integer keys comes back as {1: 'a'}), where the JVM wheel returns {'1': 'a'} (a JSON object has string keys).

Proposed change

• codec.loads_tagged returns the reply and whether a tagged value was restored; the result set ORs that flag over every reply it decodes (first batch, arcadedb_n_next, arcadedb_n_next_bin). to_json_list skips json_native when the flag is false. A binary reply whose only tags are ["B", offset, count] decodes to plain float lists and does not need the walk.
• json_native turns an RID into its text and map keys into strings, as the JVM wheel does.
• No change to to_list; to_json_list output stays identical for the tagged cases that were JSON-safe (DATE and DATETIME as epoch milliseconds, DECIMAL as float, sets as lists).

Source: probe probe_json_list.py and its out-20261103/native-json_list.log (HumemAI notes, not public); the figures above were extracted from that log by script.