Replaced the static key-value attribute storage in update-form instruments
with sample-evaluated attributes, matching the log-record attr change.
The 'attr' keyword now accepts a key and a HAProxy sample expression
evaluated at runtime.
The struct (conf.h) changed from otelc_kv/attr_len to a list of
flt_otel_conf_sample entries. The parser (parser.c) calls
flt_otel_parse_cfg_sample() with n=1 per attr keyword. At runtime
(event.c) each attribute is evaluated via flt_otel_sample_eval() and
added via flt_otel_sample_add_kv() to a bare flt_otel_scope_data_kv,
which is passed to the meter.
Updated documentation, debug macro and test configurations.
Replaced the static key-value attribute storage in log-record with
sample-evaluated attributes. The 'attr' keyword now accepts a key and a
HAProxy sample expression evaluated at runtime, instead of a static string
value.
The struct (conf.h) changed from otelc_kv/attr_len to a list of
flt_otel_conf_sample entries. The parser (parser.c) calls
flt_otel_parse_cfg_sample() with n=1 per attr keyword. At runtime
(event.c) each attribute is evaluated via flt_otel_sample_eval() and added
via flt_otel_sample_add_kv() to a bare flt_otel_scope_data_kv, which is
passed to logger->log_span().
Updated documentation, debug macro and test configurations.
Added the 'full' test configuration that exercises all 29 supported OTel
filter events with all three signal types (traces, metrics, logs). Every
instrument definition has a corresponding update.
