EDS parser

The pure parse layer (canopen-eds parser crate (BB_0081)): CiA 306 INI in, a typed in-memory IR out, with no knowledge of codegen, transports, or taktora-internal crates.

Feature: EDS parser FEAT_0062
status: open
satisfies: FEAT_0060
is satisfied by: REQ_0720, REQ_0721, REQ_0722, REQ_0723, REQ_0724, REQ_0725, REQ_0726
is refined by: CON_0021, ADR_0081
is implemented by: BB_0081

A pure parser crate. Reads CiA 306 INI, emits a typed IR rooted in Shared OD core (FEAT_0061) types. Knows nothing about codegen, transports, or taktora-internal crates. Suitable for any downstream tool — codegen, network configurator, simulator, verifier.
Requirement: Pure parse function with no I/O REQ_0720
status: open
satisfies: FEAT_0062
is verified by: TEST_0610

The crate shall expose parse(text: &str) -> Result<EdsFile, EdsError>. The function shall perform no filesystem or network I/O; the caller is responsible for reading the EDS bytes.
Requirement: no_std + alloc, no upstream coupling REQ_0721
status: open
satisfies: FEAT_0062
is verified by: TEST_0682, TEST_0611, TEST_0612

The crate shall be #![no_std] with alloc, and shall not depend on ethercrab, canopen-eds-codegen, taktora-connector-can, or any transport crate. A downstream tool that only needs the IR shall not be forced to compile the codegen layer.
Requirement: serde-derive INI backend REQ_0722
status: open
satisfies: FEAT_0062
is verified by: TEST_0610
links incoming: RISK_0021

The crate shall implement parsing on top of a serde INI deserialiser (serde_ini is the primary candidate; the alternative rust-ini is acceptable behind the same façade). Hand-written line parsing is rejected — schema maintenance lives in the serde derives.
Requirement: Parse errors carry line and column REQ_0723
status: open
satisfies: FEAT_0062
is verified by: TEST_0614

EdsError variants raised during parsing shall carry the source line and byte column of the offending construct so build-time diagnostics point at the failing EDS file location.
Requirement: Unknown sections captured as RawSection REQ_0724
status: open
satisfies: FEAT_0062
is verified by: TEST_0613

Unknown EDS sections shall be retained in the IR as RawSection { name, keys: Vec<(String, String)> }. The parser shall not hard-fail on unknown sections — direct CANopen analogue of the EtherCAT RawXml policy (Vendor extensions captured ... (ADR_0074)).
Requirement: Liberal parsing — warn and continue on quirks REQ_0725
status: open
satisfies: FEAT_0062
is verified by: TEST_0615
links incoming: RISK_0020

The parser shall be liberal on common EDS formatting quirks: BOM, CRLF/LF mix, trailing whitespace on values, comments after values (; ...), redundant whitespace around =, and EDS exporter-quirk keys (e.g. LineFeed). Quirks shall surface as EdsFile::warnings: Vec<EdsWarning> carrying { line, kind } so build-time logs can print them without failing the parse. A strict mode is not provided in this round.
Requirement: IR carries identity, OD, PDO comm + maps REQ_0726
status: open
satisfies: FEAT_0062
is verified by: TEST_0610

The IR shall represent, per device: Identity (lifted from the [Identity] block / OD index 0x1018), DeviceInfo (vendor / product names, baud-rate flags, NMT-boot-slave flag), the OD as Vec<DictEntry>, Vec<PdoMap> for declared RPDOs / TPDOs, and parallel Vec<RPdoComm> / Vec<TPdoComm> for PDO communication parameters (transmission type, cob-id, inhibit time, event timer).